/* ==========================================================================
   LAB VIRTUAL IPA: PETUALANGAN PENGUKURAN (KELAS VII SMP)
   Desain Gamified Edukasi: Fullscreen, Anti-Scroll Berlebih, Responsif,
   Tactile 3D Buttons, Animasi Denyut-Denyut, & Kontras Warna Tajam.
   ========================================================================== */

:root {
    /* Palet Warna Alam / Hutan Sains */
    --c-forest-dark: #064e3b;
    --c-forest: #047857;
    --c-forest-mid: #059669;
    --c-forest-light: #10b981;
    --c-forest-pale: #ecfdf5;

    /* Papan Kayu / Wood Accents */
    --c-wood-dark: #78350f;
    --c-wood: #92400e;
    --c-wood-mid: #b45309;
    --c-wood-light: #d97706;
    --c-wood-amber: #f59e0b;
    --c-wood-pale: #fef3c7;

    /* Kartu Game Multi-Color */
    --c-card-purple: #7c3aed;
    --c-card-blue: #0284c7;
    --c-card-red: #e11d48;
    --c-card-emerald: #059669;
    --c-card-gold: #d97706;

    /* Kontras Teks Tajam (No Dead / Faint Colors) */
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #475569;
    --text-white: #ffffff;

    /* Border & Shadow 3D Tactile - Sleek & Proportional */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-pill: 8px;

    --btn-depth-green: 0 4px 0 #065f46;
    --btn-depth-wood: 0 4px 0 #78350f;
    --btn-depth-blue: 0 4px 0 #0369a1;
    --btn-depth-gray: 0 3px 0 #94a3b8;
}

/* Reset & Box Sizing */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

body.game-theme {
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-primary);
    background-color: #064e3b;
    background: radial-gradient(ellipse 110% 75% at 50% 12%, #15803d 0%, #166534 35%, #064e3b 65%, #022c22 100%);
    background-attachment: fixed;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    line-height: 1.4;
    position: relative;
}

h1, h2, h3, h4, .nav-app-name, .btn-game-primary, .adv-title, .score-num, .sign-title {
    font-family: 'Fredoka', 'Outfit', sans-serif;
    letter-spacing: 0.3px;
}

/* Confetti Fullscreen */
#confetti-canvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
}

/* Viewport Fitted App Container */
.app-viewport-wrapper {
    width: 100%;
    max-width: 1120px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 10px 14px 20px;
}

/* ==========================================================================
   ANIMASI INTERAKTIF (DENYUT-DENYUT & SQUISH CLICK)
   ========================================================================== */
@keyframes pulse-scale {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.035);
    }
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 4px 0 #065f46, 0 0 10px rgba(16, 185, 129, 0.4);
    }
    50% {
        box-shadow: 0 4px 0 #065f46, 0 0 22px rgba(16, 185, 129, 0.85);
    }
}

.pulse-anim,
.pulse-scale {
    animation: pulse-scale 2s ease-in-out infinite;
}

.pulse-btn {
    animation: pulse-glow 2s ease-in-out infinite;
}

.pulse-hover:hover {
    transform: translateY(-4px) scale(1.02);
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-6px); }
    40%, 80% { transform: translateX(6px); }
}

.animate-shake {
    animation: shake 0.4s ease-in-out;
}

@keyframes pop {
    0% { transform: scale(0.92); opacity: 0; }
    70% { transform: scale(1.03); opacity: 1; }
    100% { transform: scale(1); opacity: 1; }
}

.animate-pop {
    animation: pop 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.ans-label {
    font-weight: 800;
    min-width: 120px;
}

.ans-val {
    flex: 1;
}

/* ==========================================================================
   NAVBAR (COMPACT & GAME HEADER)
   ========================================================================== */
.app-navbar {
    position: relative;
    z-index: 25;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #ffffff;
    border: 2px solid #059669;
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 0 #047857, 0 8px 16px rgba(0, 0, 0, 0.05);
    padding: 8px 16px;
    margin-bottom: 14px;
    gap: 10px;
    flex-shrink: 0;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    user-select: none;
}

.nav-brand-icon {
    font-size: 1.8rem;
    filter: drop-shadow(0 2px 3px rgba(0,0,0,0.15));
}

.nav-brand-info {
    display: flex;
    flex-direction: column;
}

.nav-app-name {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--c-forest-dark);
    line-height: 1.1;
}

.nav-app-sub {
    font-size: 0.72rem;
    font-weight: 700;
    color: #059669;
    letter-spacing: 0.5px;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-student-chip {
    display: flex;
    align-items: center;
    gap: 6px;
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    border-radius: 8px;
    padding: 4px 10px;
    font-size: 0.82rem;
    font-weight: 700;
    color: #166534;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.chip-avatar {
    font-size: 1rem;
}

.chip-name {
    max-width: 140px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nav-action-btn,
.nav-icon-btn {
    height: 34px;
    padding: 0 10px;
    border-radius: 8px;
    border: 1px solid #cbd5e1;
    background: #ffffff;
    color: var(--text-primary);
    font-size: 0.82rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
    transition: transform 0.1s, box-shadow 0.1s, background 0.1s;
    user-select: none;
    white-space: nowrap;
}

.nav-action-btn:hover,
.nav-icon-btn:hover {
    background: #f8fafc;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
}

.nav-action-btn:active,
.nav-icon-btn:active {
    transform: translateY(1px);
    box-shadow: none;
}

.btn-qr-action {
    background: #eff6ff;
    border-color: #bfdbfe;
    color: #1d4ed8;
}

.btn-install-action {
    background: #f0fdf4;
    border-color: #bbf7d0;
    color: #15803d;
}

.btn-exit-action {
    background: #fff1f2;
    border-color: #fecdd3;
    color: #be123c;
}

/* ==========================================================================
   APP STAGE & TRANSITIONS
   ========================================================================== */
.app-stage {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.app-screen {
    display: none;
    width: 100%;
    animation: popFadeIn 0.22s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.app-screen.active {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
}

@keyframes popFadeIn {
    from {
        opacity: 0;
        transform: scale(0.985);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* ==========================================================================
   SCREEN 0: WELCOME & ONBOARDING (PAPAN KAYU TEMA PETUALANGAN)
   ========================================================================== */
.welcome-stage-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 10px 0 20px;
    max-width: 620px;
    margin: 0 auto;
}

.wood-signboard {
    position: relative;
    width: 100%;
    margin-bottom: 16px;
    text-align: center;
}

.wood-rope {
    position: absolute;
    top: -12px;
    width: 8px;
    height: 24px;
    background: #b45309;
    border: 1.5px solid #78350f;
    border-radius: 4px;
}
.wood-rope.left { left: 18%; }
.wood-rope.right { right: 18%; }

.wood-plank {
    background: linear-gradient(180deg, #d97706 0%, #b45309 60%, #78350f 100%);
    border: 3px solid #451a03;
    border-radius: var(--radius-lg);
    box-shadow: 0 6px 0 #451a03, 0 12px 24px rgba(0, 0, 0, 0.15);
    padding: 18px 24px;
    color: white;
}

.sign-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 800;
    background: #fef3c7;
    color: #92400e;
    padding: 3px 12px;
    border-radius: var(--radius-pill);
    border: 1.5px solid #b45309;
    margin-bottom: 6px;
}

.sign-title {
    font-size: 2.1rem;
    color: #fef08a;
    text-shadow: 2px 2px 0 #78350f, 0 0 10px rgba(253, 224, 71, 0.4);
    line-height: 1.15;
    margin-bottom: 4px;
}

.sign-subtitle {
    font-size: 0.95rem;
    font-weight: 600;
    color: #fde68a;
}

.welcome-box-card {
    background: #ffffff;
    border: 2px solid #059669;
    border-radius: var(--radius-lg);
    box-shadow: 0 6px 0 #047857, 0 12px 24px rgba(0,0,0,0.06);
    padding: 24px;
    width: 100%;
}

.welcome-greeting {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 16px;
}

.student-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.form-row-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.form-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.form-field label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--c-forest-dark);
}

.form-field input {
    padding: 10px 12px;
    font-size: 0.92rem;
    font-family: inherit;
    font-weight: 600;
    border: 2px solid #cbd5e1;
    border-radius: var(--radius-md);
    background: #f8fafc;
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.2s, background 0.2s;
}

.form-field input:focus {
    border-color: #059669;
    background: #ffffff;
}

.btn-game-primary {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 14px 20px;
    font-size: 1.15rem;
    font-weight: 700;
    color: #ffffff;
    background: linear-gradient(180deg, #10b981 0%, #059669 100%);
    border: 2px solid #064e3b;
    border-radius: var(--radius-md);
    box-shadow: var(--btn-depth-green);
    cursor: pointer;
    margin-top: 6px;
    user-select: none;
    transition: transform 0.1s, box-shadow 0.1s;
}

.btn-game-primary:hover {
    background: linear-gradient(180deg, #34d399 0%, #059669 100%);
}

.btn-game-primary:active {
    transform: translateY(3px);
    box-shadow: 0 1px 0 #064e3b;
}

.welcome-quick-pills {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px;
    margin-top: 16px;
}

.welcome-quick-pills span {
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: var(--radius-pill);
    background: #f1f5f9;
    border: 1px solid #cbd5e1;
    color: #334155;
}

/* ==========================================================================
   SCREEN 1: DASHBOARD PETUALANGAN (FULL VIEWPORT GAME MAP)
   ========================================================================== */
#screen-dashboard.active {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
}

.dashboard-stage {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 14px;
    min-height: 0;
}

.stage-banner {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #ffffff;
    border: 2.5px solid #059669;
    border-radius: var(--radius-md);
    padding: 12px 20px;
    box-shadow: 0 4px 0 #047857;
}

.stage-banner h2 {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--c-forest-dark);
}

.stage-banner p {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.banner-badge {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    padding: 5px 12px;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 700;
    color: #166534;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

/* 6-Card Adventure Grid: fills desktop viewport cleanly */
.adventure-grid {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: 1fr 1fr;
    gap: 16px;
    min-height: 0;
}

.adv-card {
    position: relative;
    background: #ffffff;
    border-radius: var(--radius-lg);
    border: 2.5px solid #cbd5e1;
    padding: 20px 18px 16px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    cursor: pointer;
    user-select: none;
    height: 100%;
    box-sizing: border-box;
    transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
}

.adv-card:hover {
    transform: translateY(-4px);
}

.adv-card:active {
    transform: translateY(2px) scale(0.99);
}

.adv-card.card-green {
    border-color: #059669;
    box-shadow: 0 5px 0 #047857;
    background: linear-gradient(180deg, #ffffff 60%, #ecfdf5 100%);
}

.adv-card.card-purple {
    border-color: #7c3aed;
    box-shadow: 0 5px 0 #5b21b6;
    background: linear-gradient(180deg, #ffffff 60%, #f5f3ff 100%);
}

.adv-card.card-gold {
    border-color: #d97706;
    box-shadow: 0 5px 0 #92400e;
    background: linear-gradient(180deg, #ffffff 60%, #fffbeb 100%);
}

.adv-card.card-red {
    border-color: #e11d48;
    box-shadow: 0 5px 0 #9f1239;
    background: linear-gradient(180deg, #ffffff 60%, #fff1f2 100%);
}

.adv-card.card-amber {
    border-color: #b45309;
    box-shadow: 0 5px 0 #78350f;
    background: linear-gradient(180deg, #ffffff 60%, #fef3c7 100%);
}

.adv-card.card-blue {
    border-color: #0284c7;
    box-shadow: 0 5px 0 #0369a1;
    background: linear-gradient(180deg, #ffffff 60%, #f0f9ff 100%);
}

.adv-badge {
    position: absolute;
    top: -9px;
    right: 12px;
    font-size: 0.72rem;
    font-weight: 700;
    padding: 2.5px 8px;
    border-radius: 6px;
    background: #f8fafc;
    border: 1px solid #cbd5e1;
    color: #334155;
    text-transform: uppercase;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.adv-badge.fire-badge {
    background: #fef9c3;
    border-color: #fde047;
    color: #854d0e;
}

.adv-icon {
    font-size: 2.8rem;
    margin-bottom: 6px;
    filter: drop-shadow(0 3px 4px rgba(0,0,0,0.1));
}

.adv-title {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.adv-desc {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    line-height: 1.4;
    margin-bottom: 14px;
    flex-grow: 1;
}

.adv-btn {
    padding: 11px 14px;
    font-size: 0.92rem;
    font-weight: 800;
    border-radius: var(--radius-md);
    border: 2px solid #cbd5e1;
    background: #f8fafc;
    color: var(--text-primary);
    cursor: pointer;
    width: 100%;
    box-shadow: 0 3px 0 #94a3b8;
    transition: transform 0.1s, box-shadow 0.1s;
}

.adv-btn.btn-glow {
    background: linear-gradient(180deg, #10b981, #059669);
    border-color: #064e3b;
    color: white;
    box-shadow: 0 3px 0 #064e3b;
}

/* ==========================================================================
   INNER STAGE TOOLBAR (CONSISTENT HIGH-CONTRAST HEADER)
   ========================================================================== */
.inner-stage {
    background: #ffffff;
    border: 2px solid #059669;
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 0 #047857;
    padding: 14px;
    min-height: calc(100vh - 130px);
    display: flex;
    flex-direction: column;
}

.inner-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding-bottom: 12px;
    margin-bottom: 12px;
    border-bottom: 2px solid #f1f5f9;
    flex-wrap: wrap;
}

.btn-back-pill {
    padding: 7px 14px;
    font-size: 0.85rem;
    font-weight: 700;
    background: #ecfdf5;
    color: #047857;
    border: 2px solid #059669;
    border-radius: var(--radius-pill);
    box-shadow: 0 2px 0 #047857;
    cursor: pointer;
    transition: transform 0.1s;
}

.btn-back-pill:active {
    transform: translateY(2px);
    box-shadow: 0 0 0;
}

.slide-indicator-chip, .quiz-timer-badge, .sub-badge {
    font-size: 0.85rem;
    font-weight: 800;
    color: #064e3b;
    background: #d1fae5;
    border: 1.5px solid #10b981;
    padding: 5px 12px;
    border-radius: var(--radius-pill);
}

.toolbar-right-btns, .toolbar-portal-links {
    display: flex;
    gap: 6px;
    align-items: center;
}

.btn-tool-pill {
    padding: 6px 12px;
    font-size: 0.8rem;
    font-weight: 700;
    background: #f8fafc;
    color: var(--text-primary);
    border: 1.5px solid #cbd5e1;
    border-radius: var(--radius-pill);
    text-decoration: none;
    cursor: pointer;
    box-shadow: 0 2px 0 #94a3b8;
    display: inline-flex;
    align-items: center;
}

.btn-tool-pill:hover {
    background: #f1f5f9;
}

.btn-tool-pill:active {
    transform: translateY(2px);
    box-shadow: 0 0 0;
}

/* ==========================================================================
   SCREEN 2: BAHAN AJAR (16 SLIDE ASPECT FIT)
   ========================================================================== */
.slide-cinema-frame {
    display: flex;
    flex-direction: column;
    background: #0f172a;
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: 12px;
}

.slide-img-viewport {
    position: relative;
    width: 100%;
    max-height: 62vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000;
}

.slide-img-viewport img {
    max-width: 100%;
    max-height: 62vh;
    object-fit: contain;
    display: block;
}

.slide-arrow-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.65);
    color: white;
    border: 2px solid white;
    font-size: 1.3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform 0.15s, background 0.15s;
}

.slide-arrow-btn.left { left: 14px; }
.slide-arrow-btn.right { right: 14px; }

.slide-arrow-btn:hover {
    background: #059669;
    transform: translateY(-50%) scale(1.1);
}

.slide-bottom-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: #1e293b;
    gap: 8px;
    flex-wrap: wrap;
}

.slide-nav-hint {
    font-size: 0.78rem;
    color: #94a3b8;
}

.btn-slide-nav {
    padding: 8px 16px;
    font-size: 0.85rem;
    font-weight: 700;
    border-radius: var(--radius-md);
    border: 1.5px solid #475569;
    background: #334155;
    color: #ffffff;
    cursor: pointer;
}

.btn-slide-nav.primary {
    background: linear-gradient(180deg, #10b981, #059669);
    border-color: #047857;
    box-shadow: 0 2px 0 #064e3b;
}

.slide-strip-container {
    padding: 6px 0;
}

.slide-strip-scroll {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 6px;
}

.thumb-item {
    flex: 0 0 96px;
    border: 2px solid #cbd5e1;
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: pointer;
    background: #f8fafc;
    text-align: center;
}

.thumb-item img {
    width: 100%;
    height: 54px;
    object-fit: cover;
    display: block;
}

.thumb-item span {
    display: block;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 0;
    color: var(--text-muted);
}

.thumb-item.active {
    border-color: #059669;
    box-shadow: 0 0 0 2px rgba(5, 150, 105, 0.4);
}

.thumb-item.active span {
    background: #059669;
    color: white;
}

/* ==========================================================================
   SCREEN 3: VIRTUAL LAB (JANGKA SORONG, NERACA PEGAS, BANDUL)
   ========================================================================== */
.lab-tab-chips, .guide-tab-chips {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
    overflow-x: auto;
    padding-bottom: 4px;
}

.lab-chip-btn {
    padding: 8px 16px;
    font-size: 0.85rem;
    font-weight: 700;
    border-radius: var(--radius-pill);
    border: 2px solid #cbd5e1;
    background: #f8fafc;
    color: var(--text-primary);
    cursor: pointer;
    white-space: nowrap;
}

.lab-chip-btn.active {
    background: #059669;
    border-color: #047857;
    color: white;
    box-shadow: 0 3px 0 #064e3b;
}

.lab-panel, .guide-content-panel {
    display: none;
}

.lab-panel.active, .guide-content-panel.active {
    display: block;
}

.lab-content-box {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.lab-obj-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.bar-lbl {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-secondary);
}

.obj-chips {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.chip-btn {
    padding: 6px 12px;
    font-size: 0.8rem;
    font-weight: 700;
    border: 1.5px solid #cbd5e1;
    border-radius: var(--radius-pill);
    background: #ffffff;
    color: var(--text-primary);
    cursor: pointer;
}

.chip-btn:hover {
    border-color: #059669;
    background: #ecfdf5;
}

.caliper-canvas-holder {
    background: #f8fafc;
    border: 2px solid #cbd5e1;
    border-radius: var(--radius-md);
    display: flex;
    justify-content: center;
    overflow: hidden;
}

#vernier-canvas {
    max-width: 100%;
    height: auto;
}

.caliper-touch-tip {
    font-size: 0.8rem;
    font-weight: 600;
    color: #047857;
    text-align: center;
}

.caliper-readout-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.readout-card, .practice-card {
    background: #f8fafc;
    border: 2px solid #e2e8f0;
    border-radius: var(--radius-md);
    padding: 14px;
}

.readout-card h4, .practice-card h4 {
    font-size: 0.95rem;
    color: var(--c-forest-dark);
    margin-bottom: 8px;
}

.readout-stat {
    display: flex;
    justify-content: space-between;
    font-size: 0.88rem;
    padding: 4px 0;
    border-bottom: 1px solid #e2e8f0;
}

.readout-stat.total {
    border-bottom: none;
    margin-top: 4px;
    font-size: 1rem;
}

.highlight-green {
    color: #059669;
    font-size: 1.25rem;
}

.practice-input-row {
    display: flex;
    gap: 8px;
    margin-top: 8px;
}

.practice-input-row input {
    flex: 1;
    padding: 8px;
    font-size: 0.88rem;
    font-weight: 600;
    border: 1.5px solid #cbd5e1;
    border-radius: var(--radius-sm);
}

.btn-check-ans {
    padding: 8px 16px;
    font-size: 0.88rem;
    font-weight: 700;
    background: #059669;
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.sim-feedback {
    margin-top: 8px;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    display: none;
}

.sim-feedback.success {
    display: block;
    background: #ecfdf5;
    border: 1px solid #10b981;
    color: #065f46;
}

.sim-feedback.error {
    display: block;
    background: #fff1f2;
    border: 1px solid #f43f5e;
    color: #9f1239;
}

/* Neraca Pegas Layout */
.spring-flex-layout, .pendulum-flex-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.spring-visual, .pendulum-visual {
    background: #f8fafc;
    border: 2px solid #cbd5e1;
    border-radius: var(--radius-md);
    padding: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.spring-panel-controls, .pendulum-panel-controls {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.grav-chips {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    font-size: 0.85rem;
    font-weight: 600;
}

.spring-result-box {
    background: #ecfdf5;
    border: 2px solid #10b981;
    border-radius: var(--radius-md);
    padding: 12px;
    font-size: 0.9rem;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.formula-line {
    font-weight: 700;
    color: #059669;
    margin-top: 4px;
}

/* Bandul Stopwatch */
.slider-box label {
    font-size: 0.85rem;
    font-weight: 700;
    display: block;
    margin-bottom: 4px;
}

.slider-box input {
    width: 100%;
    accent-color: #059669;
}

.sw-widget-card {
    background: #f0fdf4;
    border: 2px solid #10b981;
    border-radius: var(--radius-md);
    padding: 14px;
    text-align: center;
}

.sw-time-display {
    font-family: 'Fredoka', monospace;
    font-size: 2.2rem;
    font-weight: 700;
    color: #065f46;
}

.sw-swings {
    font-size: 0.85rem;
    font-weight: 700;
    color: #047857;
    margin-bottom: 8px;
}

.sw-btn-row, .pendulum-act-row {
    display: flex;
    justify-content: center;
    gap: 8px;
}

.btn-game-sm {
    padding: 7px 14px;
    font-size: 0.82rem;
    font-weight: 700;
    border-radius: var(--radius-pill);
    border: 2px solid #064e3b;
    background: #059669;
    color: white;
    box-shadow: 0 3px 0 #064e3b;
    cursor: pointer;
}

.btn-game-sm.sec {
    background: #ffffff;
    border-color: #cbd5e1;
    color: var(--text-primary);
    box-shadow: 0 3px 0 #94a3b8;
}

/* LKPD Table */
.lkpd-title-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.table-wrap {
    overflow-x: auto;
}

.lkpd-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.lkpd-table th {
    background: #059669;
    color: white;
    padding: 8px;
    text-align: left;
}

.lkpd-table td {
    padding: 6px 8px;
    border-bottom: 1px solid #cbd5e1;
}

.lkpd-table input {
    width: 100%;
    padding: 6px;
    border: 1px solid #cbd5e1;
    border-radius: 4px;
}

/* ==========================================================================
   SCREEN 4: KUIS HOTS (HIGH CONTRAST, INSTANT FEEDBACK & TACTILE 3D)
   ========================================================================== */
.quiz-pag-chips {
    display: flex;
    gap: 6px;
    justify-content: center;
    margin-bottom: 14px;
    flex-wrap: wrap;
}

.pag-btn {
    min-width: 36px;
    height: 36px;
    padding: 0 8px;
    border-radius: var(--radius-pill);
    border: 2px solid #94a3b8;
    background: #ffffff;
    font-weight: 800;
    font-size: 0.85rem;
    color: #0f172a;
    cursor: pointer;
    box-shadow: 0 3px 0 #64748b;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.15s, background-color 0.15s, border-color 0.15s;
}

.pag-btn:hover {
    transform: translateY(-2px);
    border-color: #059669;
    box-shadow: 0 4px 0 #059669;
}

.pag-btn.active {
    border-color: #f59e0b;
    background: #fffbeb;
    color: #b45309;
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.4), 0 3px 0 #b45309;
    transform: scale(1.08);
    font-weight: 900;
}

.pag-btn.pag-correct {
    background: #10b981 !important;
    border-color: #064e3b !important;
    color: #ffffff !important;
    box-shadow: 0 3px 0 #064e3b !important;
    font-weight: 800;
}

.pag-btn.pag-wrong {
    background: #f43f5e !important;
    border-color: #9f1239 !important;
    color: #ffffff !important;
    box-shadow: 0 3px 0 #9f1239 !important;
    font-weight: 800;
}

.quiz-q-card {
    background: #ffffff;
    border: 2.5px solid #059669;
    border-radius: var(--radius-md);
    box-shadow: 0 5px 0 #047857;
    padding: 22px;
    margin-bottom: 16px;
}

.quiz-q-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.q-badge {
    background: linear-gradient(135deg, #059669, #047857);
    color: #ffffff;
    font-weight: 800;
    font-size: 0.8rem;
    padding: 4px 12px;
    border-radius: var(--radius-pill);
    box-shadow: 0 2px 0 #064e3b;
    text-shadow: 0 1px 2px rgba(0,0,0,0.25);
}

.q-type-badge {
    font-size: 0.8rem;
    font-weight: 800;
    color: #1e40af;
    background: #eff6ff;
    padding: 4px 12px;
    border-radius: var(--radius-pill);
    border: 1.5px solid #93c5fd;
}

.quiz-q-text {
    font-size: 1.15rem;
    font-weight: 800;
    color: #0f172a;
    line-height: 1.55;
    margin-bottom: 20px;
}

.quiz-options-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.quiz-option-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 13px 16px;
    border-radius: var(--radius-md);
    background: #ffffff;
    border: 2px solid #cbd5e1;
    color: #0f172a;
    cursor: pointer;
    box-shadow: 0 3px 0 #94a3b8;
    transition: transform 0.12s, border-color 0.15s, background-color 0.15s, box-shadow 0.12s;
}

.quiz-option-card:hover:not(.answered-locked) {
    border-color: #059669;
    background: #f0fdf4;
    transform: translateY(-2px);
    box-shadow: 0 4px 0 #059669;
}

.quiz-option-card:active:not(.answered-locked) {
    transform: translateY(2px);
    box-shadow: 0 1px 0 #059669;
}

.quiz-option-card.answered-locked {
    cursor: default;
}

/* Option States: Correct, Wrong, Key Reveal, Dimmed */
.quiz-option-card.is-opt-correct {
    background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%) !important;
    border: 2.5px solid #059669 !important;
    box-shadow: 0 4px 0 #047857 !important;
    color: #064e3b !important;
}

.quiz-option-card.is-opt-wrong {
    background: linear-gradient(135deg, #fff1f2 0%, #ffe4e6 100%) !important;
    border: 2.5px solid #e11d48 !important;
    box-shadow: 0 4px 0 #be123c !important;
    color: #881337 !important;
}

.quiz-option-card.is-opt-key-reveal {
    background: #f0fdf4 !important;
    border: 2.5px dashed #059669 !important;
    box-shadow: 0 3px 0 #047857 !important;
    color: #065f46 !important;
}

.quiz-option-card.is-opt-dimmed {
    opacity: 0.65;
    background: #f8fafc;
    border-color: #cbd5e1;
    box-shadow: none;
}

.opt-key-circle {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: #f1f5f9;
    border: 2px solid #94a3b8;
    color: #0f172a;
    font-weight: 800;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.15s;
}

.quiz-option-card.is-opt-correct .opt-key-circle {
    background: #059669;
    border-color: #064e3b;
    color: #ffffff;
    font-weight: 900;
}

.quiz-option-card.is-opt-wrong .opt-key-circle {
    background: #e11d48;
    border-color: #9f1239;
    color: #ffffff;
    font-weight: 900;
}

.quiz-option-card.is-opt-key-reveal .opt-key-circle {
    background: #047857;
    border-color: #064e3b;
    color: #ffffff;
    font-weight: 900;
}

.opt-label {
    font-size: 0.98rem;
    font-weight: 700;
    color: inherit;
    line-height: 1.45;
    flex: 1;
}

.opt-feedback-tag {
    margin-left: auto;
    font-size: 0.8rem;
    font-weight: 800;
    padding: 4px 12px;
    border-radius: var(--radius-pill);
    white-space: nowrap;
}

.opt-feedback-tag.tag-correct {
    background: #059669;
    color: #ffffff;
    box-shadow: 0 2px 0 #064e3b;
}

.opt-feedback-tag.tag-wrong {
    background: #e11d48;
    color: #ffffff;
    box-shadow: 0 2px 0 #9f1239;
}

.opt-feedback-tag.tag-key {
    background: #dcfce7;
    color: #166534;
    border: 1.5px solid #16a34a;
}

/* Instant Feedback Banner below options */
.instant-feedback-card {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 14px 18px;
    border-radius: var(--radius-md);
    margin-top: 16px;
    box-shadow: 0 3px 0 rgba(0,0,0,0.1);
}

.instant-feedback-card.feedback-correct {
    background: #ecfdf5;
    border: 2px solid #059669;
    box-shadow: 0 3px 0 #047857;
    color: #064e3b;
}

.instant-feedback-card.feedback-correct .feedback-title {
    color: #065f46;
    font-weight: 900;
    font-size: 0.95rem;
    margin-bottom: 3px;
}

.instant-feedback-card.feedback-correct .feedback-desc {
    color: #047857;
    font-size: 0.88rem;
    font-weight: 600;
    line-height: 1.4;
}

.instant-feedback-card.feedback-wrong {
    background: #fff1f2;
    border: 2px solid #e11d48;
    box-shadow: 0 3px 0 #be123c;
    color: #881337;
}

.instant-feedback-card.feedback-wrong .feedback-title {
    color: #9f1239;
    font-weight: 900;
    font-size: 0.95rem;
    margin-bottom: 3px;
}

.instant-feedback-card.feedback-wrong .feedback-desc {
    color: #881337;
    font-size: 0.88rem;
    font-weight: 600;
    line-height: 1.4;
}

.instant-feedback-card.feedback-waiting {
    background: #eff6ff;
    border: 2px solid #3b82f6;
    box-shadow: 0 3px 0 #1d4ed8;
    color: #1e40af;
}

.instant-feedback-card.feedback-waiting .feedback-desc {
    font-size: 0.88rem;
    color: #1e40af;
    font-weight: 700;
}

.feedback-badge-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    line-height: 1;
}

.feedback-content {
    flex: 1;
}

.quiz-btn-row {
    display: flex;
    justify-content: space-between;
    gap: 12px;
}

/* HIGH CONTRAST 3D QUIZ BUTTONS */
.btn-quiz-nav {
    padding: 11px 22px;
    font-size: 0.92rem;
    font-weight: 800;
    border-radius: var(--radius-md);
    border: 2.5px solid #94a3b8;
    background: #ffffff;
    color: #0f172a;
    cursor: pointer;
    box-shadow: 0 4px 0 #64748b;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: transform 0.12s, box-shadow 0.12s, background-color 0.12s;
}

.btn-quiz-nav:hover:not(:disabled):not(.disabled) {
    background: #f8fafc;
    transform: translateY(-2px);
    box-shadow: 0 5px 0 #64748b;
}

.btn-quiz-nav:active:not(:disabled):not(.disabled) {
    transform: translateY(3px);
    box-shadow: 0 1px 0 #64748b;
}

.btn-quiz-nav:disabled,
.btn-quiz-nav.disabled {
    opacity: 0.5;
    color: #64748b;
    background: #e2e8f0;
    border-color: #cbd5e1;
    box-shadow: none;
    cursor: not-allowed;
}

.btn-quiz-nav.primary {
    background: linear-gradient(180deg, #10b981 0%, #059669 100%);
    border-color: #064e3b;
    color: #ffffff !important;
    box-shadow: 0 4px 0 #064e3b;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

.btn-quiz-nav.primary:hover:not(:disabled) {
    background: linear-gradient(180deg, #34d399 0%, #059669 100%);
    box-shadow: 0 5px 0 #064e3b;
    transform: translateY(-2px);
}

.btn-quiz-nav.primary.btn-ready {
    border-color: #064e3b;
    box-shadow: 0 4px 0 #064e3b;
}

.btn-quiz-finish {
    padding: 11px 24px;
    font-size: 0.95rem;
    font-weight: 900;
    border-radius: var(--radius-md);
    background: linear-gradient(180deg, #f59e0b 0%, #d97706 100%);
    border: 2.5px solid #78350f;
    color: #ffffff !important;
    box-shadow: 0 4px 0 #78350f;
    cursor: pointer;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
    transition: transform 0.12s, box-shadow 0.12s;
}

.btn-quiz-finish:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 0 #78350f;
}

.btn-quiz-finish:active {
    transform: translateY(3px);
    box-shadow: 0 1px 0 #78350f;
}

/* Score Card */
.result-score-card {
    text-align: center;
    padding: 26px 20px;
    background: #ffffff;
    border: 2.5px solid #059669;
    border-radius: var(--radius-lg);
    box-shadow: 0 6px 0 #047857;
    margin-bottom: 20px;
}

.result-banner-tag {
    background: #ecfdf5;
    border: 1.5px solid #10b981;
    color: #047857;
    font-weight: 800;
    font-size: 0.85rem;
    padding: 5px 16px;
    border-radius: var(--radius-pill);
    display: inline-block;
    margin-bottom: 14px;
}

.score-circle {
    width: 124px;
    height: 124px;
    border-radius: 50%;
    background: radial-gradient(circle at 35% 35%, #10b981, #047857);
    color: white;
    border: 4px solid #ffffff;
    box-shadow: 0 6px 0 #064e3b;
    margin: 0 auto 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.score-num {
    font-size: 3rem;
    font-weight: 900;
    line-height: 1;
}

.score-lbl {
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.5px;
}

.result-stars {
    font-size: 1.8rem;
    margin-bottom: 6px;
}

.result-grade {
    font-size: 1.4rem;
    font-weight: 900;
    color: #064e3b;
    margin-bottom: 14px;
}

.result-meta-row {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.meta-chip {
    padding: 8px 16px;
    border-radius: var(--radius-pill);
    font-size: 0.88rem;
    font-weight: 700;
}

.meta-green {
    background: #dcfce7;
    color: #166534;
    border: 1.5px solid #86efac;
}

.meta-red {
    background: #ffe4e6;
    color: #9f1239;
    border: 1.5px solid #fecdd3;
}

.meta-blue {
    background: #e0f2fe;
    color: #075985;
    border: 1.5px solid #bae6fd;
}

.result-btn-row {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.btn-result-action {
    padding: 12px 22px;
    font-size: 0.92rem;
    font-weight: 800;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: transform 0.12s, box-shadow 0.12s;
}

.btn-result-action:hover {
    transform: translateY(-2px);
}

.btn-result-action:active {
    transform: translateY(3px);
}

.btn-cert-act {
    background: linear-gradient(180deg, #10b981 0%, #059669 100%);
    border: 2.5px solid #064e3b;
    color: #ffffff !important;
    box-shadow: 0 4px 0 #064e3b;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

.btn-cert-act:hover {
    box-shadow: 0 5px 0 #064e3b;
}

.btn-retry-act {
    background: #ffffff;
    border: 2.5px solid #94a3b8;
    color: #0f172a !important;
    box-shadow: 0 4px 0 #64748b;
}

.btn-retry-act:hover {
    box-shadow: 0 5px 0 #64748b;
    background: #f8fafc;
}

.btn-home-act {
    background: linear-gradient(180deg, #38bdf8 0%, #0284c7 100%);
    border: 2.5px solid #0369a1;
    color: #ffffff !important;
    box-shadow: 0 4px 0 #0369a1;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

.btn-home-act:hover {
    box-shadow: 0 5px 0 #0369a1;
}

/* Discussion Review Cards */
.quiz-review-container {
    margin-top: 24px;
    text-align: left;
}

.review-header-title {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    padding: 12px 16px;
    background: #ecfdf5;
    border: 2px solid #059669;
    border-radius: var(--radius-md);
    box-shadow: 0 3px 0 #047857;
}

.review-header-title .review-icon {
    font-size: 1.6rem;
}

.review-header-title h4 {
    font-size: 1.15rem;
    font-weight: 800;
    color: #064e3b;
    margin-bottom: 2px;
}

.review-header-title p {
    font-size: 0.85rem;
    color: #047857;
    font-weight: 600;
    margin: 0;
}

.review-card {
    background: #ffffff;
    border: 2px solid #cbd5e1;
    border-radius: var(--radius-md);
    padding: 16px;
    margin-bottom: 14px;
    box-shadow: 0 3px 0 #cbd5e1;
}

.review-card.is-correct {
    border-color: #059669;
    border-left: 6px solid #059669;
    box-shadow: 0 3px 0 #a7f3d0;
}

.review-card.is-wrong {
    border-color: #e11d48;
    border-left: 6px solid #e11d48;
    box-shadow: 0 3px 0 #fecdd3;
}

.review-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.rev-no {
    font-size: 0.82rem;
    font-weight: 800;
    background: #0f172a;
    color: #ffffff;
    padding: 4px 10px;
    border-radius: var(--radius-pill);
}

.rev-status.status-correct {
    font-size: 0.82rem;
    font-weight: 800;
    background: #dcfce7;
    color: #15803d;
    border: 1.5px solid #86efac;
    padding: 4px 12px;
    border-radius: var(--radius-pill);
}

.rev-status.status-wrong {
    font-size: 0.82rem;
    font-weight: 800;
    background: #ffe4e6;
    color: #be123c;
    border: 1.5px solid #fda4af;
    padding: 4px 12px;
    border-radius: var(--radius-pill);
}

.rev-q {
    font-size: 1rem;
    font-weight: 700;
    color: #0f172a;
    line-height: 1.5;
    margin-bottom: 12px;
}

.rev-ans-row {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 12px;
}

.ans-badge-item {
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    display: flex;
    gap: 8px;
    align-items: baseline;
    flex-wrap: wrap;
}

.ans-user-correct {
    background: #f0fdf4;
    border: 1.5px solid #86efac;
    color: #15803d;
}

.ans-user-wrong {
    background: #fff1f2;
    border: 1.5px solid #fecdd3;
    color: #be123c;
}

.ans-key-item {
    background: #eff6ff;
    border: 1.5px solid #bfdbfe;
    color: #1d4ed8;
}

.rev-expl {
    background: #f0fdf4;
    border: 1.5px solid #86efac;
    border-radius: var(--radius-sm);
    padding: 12px 14px;
}

.expl-title {
    font-size: 0.88rem;
    font-weight: 800;
    color: #166534;
    margin-bottom: 4px;
}

.expl-body {
    font-size: 0.88rem;
    color: #14532d;
    line-height: 1.55;
    font-weight: 500;
}

/* Helper Utilities */
.text-success {
    color: #059669 !important;
    font-weight: 700;
}

.text-danger {
    color: #e11d48 !important;
    font-weight: 700;
}

.highlight {
    background: #fef08a;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 800;
    color: #854d0e;
}

/* High Contrast Result Instrument Box */
.result-box {
    background: #0f172a;
    border: 2px solid #0284c7;
    border-radius: var(--radius-md);
    padding: 14px 18px;
    color: #f8fafc;
    box-shadow: 0 4px 0 #0369a1;
}

.res-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 5px 0;
    font-size: 0.9rem;
    font-weight: 600;
    color: #cbd5e1;
}

.res-row strong {
    color: #38bdf8;
    font-size: 1.1rem;
    font-family: 'JetBrains Mono', monospace;
}

.res-row.highlight {
    color: #facc15;
    font-weight: 800;
    border-top: 1px dashed #334155;
    margin-top: 6px;
    padding-top: 8px;
}

.dashboard-stage {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.banner-text {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.cert-signed {
    margin-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}

.certificate-canvas-wrap {
    width: 100%;
    display: flex;
    justify-content: center;
}

/* ==========================================================================
   VIDEO & GUIDE SCREENS
   ========================================================================== */
.video-compact-box {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 16px;
}

.video-holder {
    background: #000;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.video-holder video {
    width: 100%;
    max-height: 55vh;
    display: block;
}

.video-points-card {
    background: #f8fafc;
    border: 2px solid #cbd5e1;
    border-radius: var(--radius-md);
    padding: 16px;
}

.video-points-card h4 {
    color: var(--c-forest-dark);
    margin-bottom: 10px;
}

.styled-numbered-list {
    padding-left: 18px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.styled-numbered-list code {
    background: #ecfdf5;
    color: #047857;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 700;
}

.guide-box {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

.guide-summary-card {
    background: #f8fafc;
    border: 2px solid #cbd5e1;
    border-radius: var(--radius-md);
    padding: 16px;
}

.guide-summary-card h3 {
    color: var(--c-forest-dark);
    margin-bottom: 8px;
}

.guide-summary-card p {
    font-size: 0.88rem;
    margin-bottom: 8px;
}

.guide-summary-card code {
    background: #ecfdf5;
    color: #047857;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 700;
}

.guide-img-scroll {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-height: 65vh;
    overflow-y: auto;
}

.guide-img-scroll img {
    width: 100%;
    border-radius: var(--radius-sm);
    box-shadow: 0 3px 8px rgba(0,0,0,0.1);
}

.modul-box-content h3 {
    font-size: 1.3rem;
    color: var(--c-forest-dark);
}

.modul-sub {
    font-size: 0.85rem;
    font-weight: 700;
    color: #059669;
    margin-bottom: 14px;
}

.modul-points-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 12px;
}

.modul-p-item {
    background: #f8fafc;
    border: 2px solid #cbd5e1;
    border-radius: var(--radius-md);
    padding: 14px;
}

.modul-p-item strong {
    display: block;
    font-size: 0.95rem;
    color: var(--c-forest-dark);
    margin-bottom: 6px;
}

.modul-p-item p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ==========================================================================
   CUSTOM IN-APP MODALS (NO BROWSER POPUPS!)
   ========================================================================== */
.custom-modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 16px;
}

.custom-modal-backdrop.active {
    display: flex;
}

.custom-modal-card {
    background: #ffffff;
    border-radius: var(--radius-lg);
    border: 3px solid #059669;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    max-width: 440px;
    width: 100%;
    padding: 20px;
    animation: popFadeIn 0.2s ease-out;
}

.custom-modal-card.dialog-box {
    text-align: center;
    max-width: 380px;
}

.dialog-icon {
    font-size: 2.8rem;
    margin-bottom: 8px;
}

.dialog-box h3 {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.dialog-box p {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.dialog-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.btn-dialog-cancel {
    padding: 10px 20px;
    font-size: 0.9rem;
    font-weight: 700;
    border-radius: var(--radius-md);
    border: 2px solid #cbd5e1;
    background: #ffffff;
    cursor: pointer;
    box-shadow: 0 2px 0 #94a3b8;
}

.btn-dialog-confirm {
    padding: 10px 20px;
    font-size: 0.9rem;
    font-weight: 800;
    border-radius: var(--radius-md);
    border: 2px solid #be123c;
    background: #e11d48;
    color: white;
    cursor: pointer;
    box-shadow: 0 3px 0 #9f1239;
}

.modal-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid #f1f5f9;
    padding-bottom: 10px;
    margin-bottom: 12px;
}

.modal-top h3 {
    font-size: 1.15rem;
    color: var(--c-forest-dark);
}

.btn-modal-x {
    background: none;
    border: none;
    font-size: 1.3rem;
    color: #64748b;
    cursor: pointer;
}

.modal-content-center {
    text-align: center;
}

.modal-content-center p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.qr-code-box {
    display: flex;
    justify-content: center;
    margin-bottom: 14px;
}

.qr-code-box canvas {
    border: 4px solid #d1fae5;
    border-radius: var(--radius-md);
}

.copy-link-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.copy-link-bar input {
    flex: 1;
    padding: 8px 10px;
    font-size: 0.82rem;
    border: 1.5px solid #cbd5e1;
    border-radius: var(--radius-sm);
    background: #f8fafc;
}

.btn-copy-link {
    padding: 8px 14px;
    font-size: 0.82rem;
    font-weight: 700;
    background: #059669;
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.modal-bottom {
    display: flex;
    justify-content: center;
    margin-top: 10px;
}

/* Certificate Modal */
.custom-modal-card.cert-dialog {
    max-width: 680px;
    max-height: 94vh;
    overflow-y: auto;
}

.cert-gold-frame {
    border: 6px double #d97706;
    padding: 12px;
    background: #fffdfa;
    border-radius: 6px;
}

.cert-inner-content {
    border: 1.5px solid #b45309;
    padding: 20px;
    text-align: center;
}

.cert-brand {
    font-size: 0.95rem;
    font-weight: 800;
    color: #059669;
    margin-bottom: 4px;
}

.cert-main-title {
    font-size: 1.8rem;
    font-weight: 800;
    color: #78350f;
    letter-spacing: 2px;
}

.cert-subtitle {
    font-size: 0.8rem;
    font-style: italic;
    color: #92400e;
    margin-bottom: 16px;
}

.cert-for {
    font-size: 0.85rem;
    color: #64748b;
}

.cert-name {
    font-size: 1.9rem;
    color: #064e3b;
    text-decoration: underline;
    text-decoration-color: #f59e0b;
    margin: 6px 0;
}

.cert-meta {
    font-size: 0.92rem;
    font-weight: 700;
    color: #334155;
    margin-bottom: 12px;
}

.cert-score-chip {
    display: inline-block;
    padding: 8px 20px;
    border: 1.5px solid #059669;
    border-radius: 8px;
    background: #ecfdf5;
    margin-bottom: 18px;
}

.score-chip-val {
    font-size: 1.5rem;
    font-weight: 800;
    color: #047857;
    display: block;
}

.cert-score-lbl {
    font-size: 0.72rem;
    font-weight: 700;
    color: #065f46;
}

.cert-bottom-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    border-top: 1px dashed #cbd5e1;
    padding-top: 12px;
    font-size: 0.78rem;
}

.cert-stamp {
    border: 2px dashed #d97706;
    padding: 6px 12px;
    border-radius: 50%;
    color: #b45309;
    font-weight: 800;
    background: #fef3c7;
}

.sign-underline {
    border-top: 1.5px solid #334155;
    padding-top: 2px;
    font-weight: 700;
    margin-top: 24px;
}

/* ==========================================================================
   PRINT MEDIA QUERY
   ========================================================================== */
@media print {
    body {
        background: white !important;
    }
    .app-navbar, .inner-toolbar, .modal-top, .modal-bottom, .btn-game-primary {
        display: none !important;
    }
    .custom-modal-backdrop {
        position: static !important;
        background: none !important;
        display: block !important;
        padding: 0 !important;
    }
    .custom-modal-card {
        box-shadow: none !important;
        border: none !important;
        padding: 0 !important;
    }
}

/* ==========================================================================
   RESPONSIVE DESIGN (MODE MOBILE OPTIMIZED)
   ========================================================================== */
@media (max-width: 860px) {
    .video-compact-box, .guide-box, .spring-flex-layout, .pendulum-flex-layout, .caliper-readout-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 680px) {
    .app-viewport-wrapper {
        padding: 6px 8px 14px;
        min-height: 100dvh;
    }

    .app-navbar {
        padding: 6px 8px;
        margin-bottom: 8px;
        gap: 6px;
        width: 100%;
        box-sizing: border-box;
        overflow: hidden;
    }

    .nav-left {
        gap: 6px;
        min-width: 0;
        overflow: hidden;
        flex-shrink: 1;
    }

    .nav-brand-icon {
        font-size: 1.3rem;
        flex-shrink: 0;
    }

    .nav-app-name {
        font-size: 0.8rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .nav-app-sub {
        display: none;
    }

    .nav-right {
        gap: 4px;
        flex-shrink: 0;
    }

    .nav-student-chip {
        width: 32px;
        height: 32px;
        padding: 0;
        justify-content: center;
        border-radius: 50%;
        min-width: 32px;
    }

    .chip-name {
        display: none;
    }

    .chip-avatar {
        font-size: 1.1rem;
    }

    .btn-text-desktop {
        display: none;
    }

    .nav-action-btn,
    .nav-icon-btn {
        width: 32px;
        height: 32px;
        padding: 0;
        justify-content: center;
        font-size: 0.95rem;
        min-width: 32px;
    }

    /* 2 COLUMNS COMPACT FOR MOBILE */
    .adventure-grid {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: auto;
        gap: 10px;
        flex: initial;
    }

    .adv-card {
        padding: 12px 10px 10px;
        min-height: 155px;
    }

    .adv-icon {
        font-size: 1.8rem;
        margin-bottom: 4px;
    }

    .adv-title {
        font-size: 0.95rem;
    }

    .adv-desc {
        font-size: 0.72rem;
        margin-bottom: 8px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .adv-btn {
        padding: 6px 8px;
        font-size: 0.75rem;
    }

    .form-row-2 {
        grid-template-columns: 1fr;
    }

    .sign-title {
        font-size: 1.6rem;
    }

    .welcome-box-card {
        padding: 16px;
    }

    .inner-stage {
        padding: 10px;
        min-height: auto;
    }

    .slide-arrow-btn {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }

    .quiz-q-text {
        font-size: 1rem;
    }

    .opt-label {
        font-size: 0.85rem;
    }

    .wood-signboard-grand .sign-title {
        font-size: 1.65rem;
    }

    .cover-features-grid {
        grid-template-columns: 1fr;
    }

    .btn-grand-play {
        padding: 13px 18px;
        gap: 12px;
    }

    .play-text-primary {
        font-size: 1.15rem;
    }

    .play-icon-triangle {
        width: 38px;
        height: 38px;
        font-size: 1.15rem;
    }
}

/* ==========================================================================
   ANIMATED FLOATING NATURE & SCIENCE DECOR BACKGROUND (HIGH CONTRAST)
   ========================================================================== */
.nature-decor-bg {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
    box-shadow: inset 0 0 100px rgba(2, 44, 34, 0.7);
}

/* Golden Sunbeam Light Rays from top */
.sunbeam-light-rays {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 65vh;
    background: radial-gradient(ellipse 90% 60% at 50% -10%, rgba(254, 240, 138, 0.24) 0%, rgba(187, 247, 208, 0.08) 50%, transparent 80%);
    pointer-events: none;
}

/* Forest Corner Foliage Canopies */
.forest-canopy {
    position: absolute;
    top: 0;
    width: 260px;
    height: 180px;
    pointer-events: none;
    z-index: 1;
    opacity: 0.9;
}

.forest-canopy.left {
    left: 0;
    background: radial-gradient(ellipse at 0% 0%, #064e3b 0%, #14532d 55%, transparent 75%);
    border-bottom-right-radius: 140px;
}

.forest-canopy.right {
    right: 0;
    background: radial-gradient(ellipse at 100% 0%, #064e3b 0%, #14532d 55%, transparent 75%);
    border-bottom-left-radius: 140px;
}

/* Forest Bottom Hills Gradient */
.forest-bottom-hills {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 18vh;
    background: linear-gradient(to top, rgba(2, 44, 34, 0.95) 0%, rgba(6, 78, 59, 0.4) 60%, transparent 100%);
    pointer-events: none;
}

.cloud-drift {
    position: absolute;
    font-size: 2.8rem;
    opacity: 0.4;
    filter: drop-shadow(0 4px 10px rgba(255, 255, 255, 0.8));
    animation: drift-horizontal linear infinite;
    user-select: none;
}
.cloud-drift.c1 { top: 6%; left: -10%; animation-duration: 48s; }
.cloud-drift.c2 { top: 22%; left: -15%; animation-duration: 65s; animation-delay: -20s; font-size: 3.5rem; opacity: 0.28; }
.cloud-drift.c3 { top: 75%; left: -12%; animation-duration: 55s; animation-delay: -35s; font-size: 2.2rem; opacity: 0.35; }

@keyframes drift-horizontal {
    from { transform: translateX(0); }
    to { transform: translateX(125vw); }
}

.leaf-drift {
    position: absolute;
    font-size: 1.6rem;
    opacity: 0.65;
    animation: leaf-sway 14s ease-in-out infinite;
    user-select: none;
}
.leaf-drift.l1 { top: 12%; left: 6%; animation-duration: 12s; }
.leaf-drift.l2 { top: 26%; right: 7%; animation-duration: 16s; animation-delay: -4s; font-size: 1.9rem; }
.leaf-drift.l3 { bottom: 15%; left: 5%; animation-duration: 14s; animation-delay: -8s; }
.leaf-drift.l4 { top: 60%; right: 9%; animation-duration: 18s; animation-delay: -10s; font-size: 1.5rem; }

@keyframes leaf-sway {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(24px) rotate(20deg); }
}

.spark-drift {
    position: absolute;
    font-size: 1.5rem;
    opacity: 0.7;
    animation: spark-pulse 4s ease-in-out infinite;
    user-select: none;
}
.spark-drift.s1 { top: 38%; right: 10%; animation-delay: -1s; }
.spark-drift.s2 { bottom: 22%; right: 14%; animation-delay: -2.5s; font-size: 1.7rem; }
.spark-drift.s3 { top: 18%; left: 14%; animation-delay: -1.8s; font-size: 1.4rem; }

@keyframes spark-pulse {
    0%, 100% { transform: scale(0.9) rotate(0deg); opacity: 0.4; }
    50% { transform: scale(1.22) rotate(16deg); opacity: 0.95; }
}

/* ==========================================================================
   SCREEN 00: GRAND JUNGLE ADVENTURE COVER (VIEWPORT-FITTED, ZERO SCROLLBAR)
   Ref: Pufieduland Digital - Papan Kayu Gantung, Hutan Eksplorasi Rimbun,
   Tombol Mulai 3D Denyut-Denyut, Kontras Warna Tajam, Modal Identitas Terintegrasi
   ========================================================================== */
#screen-cover {
    display: none;
    position: relative;
    width: 100%;
    height: 100vh;
    max-height: 100vh;
    overflow: hidden;
    box-sizing: border-box;
    padding: 14px 20px;
    background: radial-gradient(ellipse 120% 85% at 50% 20%, #166534 0%, #14532d 30%, #064e3b 65%, #022c22 100%);
}

#screen-cover.active {
    display: flex !important;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    min-height: 100vh;
}

/* Atmospheric Sunbeams & Jungle Framing */
.sunbeam-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: radial-gradient(circle at 50% 0%, rgba(250, 204, 21, 0.18) 0%, rgba(34, 197, 94, 0.08) 45%, transparent 75%);
    z-index: 1;
}

.jungle-canopy-top {
    position: absolute;
    top: 0;
    width: 220px;
    height: 140px;
    pointer-events: none;
    z-index: 2;
    background-repeat: no-repeat;
    opacity: 0.85;
}

#screen-cover:not(.active) .jungle-canopy-top,
#screen-cover:not(.active) .jungle-ferns-bottom,
body:not(.on-cover) .jungle-canopy-top,
body:not(.on-cover) .jungle-ferns-bottom {
    display: none !important;
}

.jungle-canopy-top.left {
    left: 0;
    background: radial-gradient(circle at 0% 0%, #15803d 0%, #166534 40%, transparent 70%);
}

.jungle-canopy-top.right {
    right: 0;
    background: radial-gradient(circle at 100% 0%, #15803d 0%, #166534 40%, transparent 70%);
}

.jungle-ferns-bottom {
    position: absolute;
    bottom: 0;
    width: 260px;
    height: 130px;
    pointer-events: none;
    z-index: 2;
    opacity: 0.85;
}

.jungle-ferns-bottom.left {
    left: 0;
    background: radial-gradient(circle at 0% 100%, #14532d 0%, #064e3b 45%, transparent 75%);
}

.jungle-ferns-bottom.right {
    right: 0;
    background: radial-gradient(circle at 100% 100%, #14532d 0%, #064e3b 45%, transparent 75%);
}

/* Central Stage Container */
.cover-stage-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    width: 100%;
    max-width: 620px;
    margin: auto;
    position: relative;
    z-index: 3;
}

/* Grand Hanging Wooden Board with Swaying Ropes */
.wood-signboard-grand {
    width: 100%;
    margin-bottom: 0;
    position: relative;
}

.wood-signboard-grand .wood-rope {
    position: absolute;
    top: -16px;
    width: 9px;
    height: 32px;
    background: repeating-linear-gradient(180deg, #b45309 0px, #d97706 4px, #78350f 8px);
    border: 2px solid #451a03;
    border-radius: 4px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.4);
    z-index: 1;
}

.wood-signboard-grand .wood-rope.left { left: 16%; }
.wood-signboard-grand .wood-rope.right { right: 16%; }

.wood-signboard-grand .wood-plank {
    padding: 18px 28px;
    text-align: center;
    background: linear-gradient(180deg, #9a3412 0%, #7c2d12 40%, #451a03 100%);
    border: 4px solid #d97706;
    border-radius: 18px;
    box-shadow: 0 9px 0 #290e02, 0 24px 44px rgba(0, 0, 0, 0.65);
    position: relative;
}

.wood-signboard-grand .sign-tag {
    font-size: 0.78rem;
    font-weight: 800;
    background: #fef3c7;
    color: #92400e;
    padding: 3px 14px;
    border-radius: var(--radius-pill);
    border: 1.5px solid #b45309;
    margin-bottom: 6px;
    display: inline-block;
    letter-spacing: 0.5px;
}

.wood-signboard-grand .sign-title {
    font-size: 2.35rem;
    color: #fef08a;
    text-shadow: 0 3px 0 #290e02, 0 6px 14px rgba(0, 0, 0, 0.85);
    margin: 4px 0 6px;
    letter-spacing: 0.5px;
    line-height: 1.15;
}

.sign-ribbon-sub {
    display: inline-block;
    background: linear-gradient(180deg, #fde047 0%, #eab308 50%, #ca8a04 100%);
    border: 2px solid #78350f;
    border-radius: 8px;
    padding: 5px 18px;
    box-shadow: 0 3px 0 #78350f, 0 4px 8px rgba(0, 0, 0, 0.25);
}

.sign-ribbon-sub span {
    font-size: 0.88rem;
    font-weight: 800;
    color: #451a03;
    letter-spacing: 0.3px;
    text-shadow: 0 1px 0 rgba(255, 255, 255, 0.6);
}

/* Organic Jungle Content Hub (No Harsh White Card) */
.cover-content-hub {
    background: rgba(2, 44, 34, 0.75);
    border: 2px solid rgba(52, 211, 153, 0.5);
    border-radius: 18px;
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.55), inset 0 1px 1px rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    padding: 16px 24px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    text-align: center;
    box-sizing: border-box;
}

.cover-badge-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
}

.cover-pill {
    font-size: 0.82rem;
    font-weight: 800;
    padding: 5px 14px;
    border-radius: var(--radius-pill);
    background: rgba(6, 78, 59, 0.9);
    border: 1.5px solid #34d399;
    color: #ffffff;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.6);
}

.cover-teaser-text {
    font-size: 0.92rem;
    line-height: 1.5;
    color: #f0fdf4;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8);
    max-width: 520px;
    margin: 0;
}

.cover-teaser-text strong {
    color: #86efac;
    font-weight: 800;
}

/* 3D Giant Tactile Play Button with Squish Animation */
.cover-action-wrap {
    width: 100%;
    display: flex;
    justify-content: center;
    margin: 2px 0;
}

.btn-grand-play {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    width: 100%;
    max-width: 440px;
    padding: 14px 26px;
    background: linear-gradient(180deg, #34d399 0%, #10b981 45%, #059669 100%);
    border: 3.5px solid #a7f3d0;
    border-radius: 16px;
    box-shadow: 0 7px 0 #064e3b, 0 18px 36px rgba(16, 185, 129, 0.5);
    color: #ffffff;
    cursor: pointer;
    text-align: left;
    user-select: none;
    transition: transform 0.12s ease, box-shadow 0.12s ease;
    overflow: hidden;
}

.btn-grand-play:hover {
    background: linear-gradient(180deg, #4ade80 0%, #22c55e 50%, #16a34a 100%);
    box-shadow: 0 8px 0 #064e3b, 0 22px 42px rgba(34, 197, 94, 0.6);
    transform: translateY(-2px);
}

.btn-grand-play:active {
    transform: translateY(4px);
    box-shadow: 0 2px 0 #064e3b, 0 6px 14px rgba(6, 78, 59, 0.3);
}

.squish-pulse {
    animation: squish-pulse 2.2s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

@keyframes squish-pulse {
    0%, 100% { transform: scale(1); }
    40% { transform: scale(1.03) scaleY(0.97); }
    60% { transform: scale(0.985) scaleY(1.02); }
    80% { transform: scale(1.015) scaleY(0.99); }
}

.play-icon-triangle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: #fef08a;
    border: 2.5px solid #b45309;
    border-radius: 50%;
    color: #b45309;
    font-size: 1.4rem;
    box-shadow: 0 3px 0 #78350f;
    flex-shrink: 0;
    transition: transform 0.2s;
}

.btn-grand-play:hover .play-icon-triangle {
    transform: scale(1.1) rotate(6deg);
}

.play-btn-texts {
    display: flex;
    flex-direction: column;
}

.play-text-primary {
    font-size: 1.25rem;
    font-weight: 800;
    color: #ffffff;
    text-shadow: 0 2px 3px rgba(0, 0, 0, 0.4);
    letter-spacing: 0.5px;
    line-height: 1.2;
}

.play-text-sub {
    font-size: 0.78rem;
    font-weight: 700;
    color: #ecfdf5;
    opacity: 0.95;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

/* Auxiliary Bottom Links Dock */
.cover-aux-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-top: 2px;
    width: 100%;
}

.btn-aux-pill {
    padding: 7px 16px;
    font-size: 0.82rem;
    font-weight: 700;
    color: #ecfdf5;
    background: rgba(6, 78, 59, 0.85);
    border: 1.5px solid #34d399;
    border-radius: var(--radius-pill);
    box-shadow: 0 3px 0 #022c22, 0 4px 10px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    transition: all 0.15s ease;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.6);
}

.btn-aux-pill:hover {
    background: #10b981;
    color: #ffffff;
    border-color: #a7f3d0;
    transform: translateY(-2px);
    box-shadow: 0 4px 0 #022c22, 0 8px 16px rgba(16, 185, 129, 0.4);
}

@media (max-width: 640px) {
    #screen-cover {
        padding: 10px 14px;
    }
    .wood-signboard-grand .wood-plank {
        padding: 14px 18px;
    }
    .wood-signboard-grand .sign-title {
        font-size: 1.65rem;
    }
    .sign-ribbon-sub span {
        font-size: 0.75rem;
    }
    .cover-content-hub {
        padding: 12px 16px;
        gap: 10px;
    }
    .cover-teaser-text {
        font-size: 0.82rem;
    }
    .btn-grand-play {
        padding: 12px 18px;
        gap: 12px;
    }
    .play-text-primary {
        font-size: 1.05rem;
    }
    .play-text-sub {
        font-size: 0.7rem;
    }
    .btn-aux-pill {
        padding: 6px 12px;
        font-size: 0.75rem;
    }
}

/* ==========================================================================
   STUDENT REGISTRATION & PROFILE MODAL DIALOG
   ========================================================================== */
.student-reg-dialog {
    max-width: 520px;
    width: 92%;
    padding: 24px 28px;
    border-radius: var(--radius-lg);
    border: 3px solid #10b981;
    box-shadow: 0 16px 45px rgba(0, 0, 0, 0.45);
    background: #ffffff;
    box-sizing: border-box;
}

.modal-top-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.modal-avatar-ico {
    font-size: 2.2rem;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #dcfce7;
    border: 2px solid #86efac;
    border-radius: 50%;
}

.modal-subtext {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 2px 0 0;
}

.reg-student-box {
    display: flex;
    align-items: center;
    gap: 16px;
    background: #f0fdf4;
    border: 2px solid #86efac;
    border-radius: var(--radius-md);
    padding: 16px 20px;
    margin-bottom: 16px;
}

.reg-avatar {
    font-size: 2.4rem;
}

.reg-badge-tag {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 800;
    color: #047857;
    background: #dcfce7;
    padding: 2px 8px;
    border-radius: var(--radius-pill);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.reg-name {
    font-size: 1.3rem;
    color: #065f46;
    margin: 4px 0 2px;
    font-weight: 800;
}

.reg-meta {
    font-size: 0.84rem;
    color: var(--text-secondary);
    margin: 0;
}

.modal-actions-col {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.text-req {
    color: #dc2626;
    font-weight: 800;
}

.modal-btn-row {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-top: 18px;
}

.modal-btn-row .flex-1 {
    flex: 1;
}

.btn-dialog-cancel {
    padding: 12px 20px;
    font-size: 0.95rem;
    font-weight: 700;
    color: #475569;
    background: #f1f5f9;
    border: 1.5px solid #cbd5e1;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
    white-space: nowrap;
}

.btn-dialog-cancel:hover {
    background: #e2e8f0;
    color: #0f172a;
    border-color: #94a3b8;
}

.btn-aux-pill {
    padding: 8px 14px;
    font-size: 0.82rem;
    font-weight: 700;
    color: #334155;
    background: #f1f5f9;
    border: 1.5px solid #cbd5e1;
    border-radius: var(--radius-pill);
    box-shadow: 0 2px 0 #94a3b8;
    cursor: pointer;
    transition: all 0.15s;
}

.btn-aux-pill:hover {
    background: #e2e8f0;
    color: #0f172a;
    transform: translateY(-1px);
}

.btn-aux-pill:active {
    transform: translateY(2px);
    box-shadow: none;
}

/* Welcome Top Nav */
.welcome-top-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    margin-bottom: 8px;
}

.welcome-step-badge {
    font-size: 0.78rem;
    font-weight: 800;
    color: #065f46;
    background: #d1fae5;
    border: 1px solid #a7f3d0;
    padding: 3px 10px;
    border-radius: var(--radius-pill);
}

/* Certificate Modal Action Bottom */
.cert-modal-bottom-row {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    flex-wrap: wrap;
}

.btn-cert-home {
    background: #f1f5f9;
    border-color: #cbd5e1;
    color: #334155;
}

/* Guide Steps Modal */
.modal-body-scroll {
    max-height: 60vh;
    overflow-y: auto;
    padding: 12px 6px;
}

.guide-steps-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.g-step-item {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    padding: 10px 14px;
    background: #f8fafc;
    border: 1.5px solid #e2e8f0;
    border-radius: var(--radius-md);
}

.step-num-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: #10b981;
    color: #ffffff;
    font-weight: 800;
    font-size: 1rem;
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: 0 2px 0 #064e3b;
}

.step-desc-block strong {
    font-size: 0.9rem;
    color: var(--text-primary);
}

.step-desc-block p {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* Info Modal Content */
.app-info-block {
    display: flex;
    flex-direction: column;
    gap: 12px;
    text-align: left;
}

.app-info-block h4 {
    font-size: 1.05rem;
    color: #065f46;
}

.info-kv-grid {
    display: flex;
    flex-direction: column;
    gap: 8px;
    background: #f8fafc;
    border: 1.5px solid #e2e8f0;
    border-radius: var(--radius-md);
    padding: 12px 16px;
}

.kv-item {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.kv-item strong {
    color: var(--text-primary);
}

/* ==========================================================================
   ONLINE LAB HUB (OLABS & PHET DIRECT INTEGRATION)
   ========================================================================== */
.online-hub-header {
    text-align: center;
    margin-bottom: 16px;
}

.online-hub-header h3 {
    font-size: 1.25rem;
    color: #065f46;
    margin-bottom: 4px;
}

.online-hub-header p {
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.online-hub-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 14px;
    margin-bottom: 16px;
}

.online-hub-card {
    background: #ffffff;
    border: 2px solid #cbd5e1;
    border-radius: var(--radius-md);
    padding: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    box-shadow: 0 4px 0 #94a3b8;
    transition: transform 0.2s, border-color 0.2s;
}

.online-hub-card:hover {
    transform: translateY(-3px);
    border-color: #059669;
}

.online-hub-card .hub-icon {
    font-size: 2.2rem;
    margin-bottom: 8px;
}

.online-hub-card h4 {
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: 6px;
    line-height: 1.25;
}

.online-hub-card p {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 14px;
    flex: 1;
}

.online-hub-card .hub-action-row {
    width: 100%;
}

.online-hub-card .btn-game-primary {
    font-size: 0.88rem;
    padding: 10px 14px;
    text-decoration: none;
    width: 100%;
}

.online-hub-notice {
    background: #ecfdf5;
    border: 1.5px solid #a7f3d0;
    border-radius: var(--radius-md);
    padding: 12px 16px;
    font-size: 0.85rem;
    color: #065f46;
    line-height: 1.45;
}

/* ==========================================================================
   IN-APP SIMULATION EMBEDDED PLAYER (PHET & OLABS)
   ========================================================================== */
.online-hub-topbar {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    padding-bottom: 10px;
    border-bottom: 1.5px solid #e2e8f0;
}

.sim-switch-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.sim-actions-row {
    display: flex;
    gap: 8px;
    align-items: center;
}

.sim-iframe-holder {
    position: relative;
    width: 100%;
    height: 520px;
    background: #0f172a;
    border: 2px solid #059669;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.sim-iframe-holder:fullscreen,
.sim-iframe-holder:-webkit-full-screen {
    width: 100vw;
    height: 100vh;
    border: none;
    border-radius: 0;
}

.sim-iframe-holder iframe,
#inapp-sim-frame,
#phet-inapp-frame,
#olabs-caliper-frame,
#olabs-spring-frame {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
    background: #ffffff;
}

.online-hub-footer {
    margin-top: 10px;
    padding: 10px 14px;
    background: #f0fdf4;
    border: 1.5px solid #a7f3d0;
    border-radius: var(--radius-md);
}

.hub-status-info span {
    display: block;
    font-size: 0.92rem;
    color: #065f46;
    margin-bottom: 3px;
}

.hub-status-info p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* ==========================================================================
   SIMULATION SUBVIEWS & MODE TOGGLE BAR
   ========================================================================== */
.sim-mode-toggle-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 12px;
    padding-bottom: 10px;
    border-bottom: 1.5px solid #e2e8f0;
}

.mode-toggle-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.lab-subview {
    display: none;
    width: 100%;
}

.lab-subview.active {
    display: block;
}

/* ==========================================================================
   VIDEO PRAKTIKUM: 3 MEASUREMENT PANELS
   ========================================================================== */
.video-panel {
    display: none;
    width: 100%;
}

.video-panel.active {
    display: block;
}

.video-iframe-wrap {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
    height: 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: #0f172a;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.video-iframe-wrap iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.video-quick-action {
    margin-top: 14px;
    padding-top: 10px;
    border-top: 1px dashed #cbd5e1;
    display: flex;
    justify-content: flex-end;
}

/* ==========================================================================
   MODAL 6: DOWNLOAD & INSTALL PWA DIALOG
   ========================================================================== */
.download-dialog {
    max-width: 620px;
}

.download-modal-intro {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.45;
    margin-bottom: 16px;
    padding: 10px 14px;
    background: #f0fdf4;
    border-radius: 8px;
    border: 1px solid #bbf7d0;
}

.dl-feature-card {
    display: flex;
    gap: 12px;
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    padding: 14px;
    margin-bottom: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.dl-card-icon {
    font-size: 1.8rem;
    flex-shrink: 0;
}

.dl-card-info {
    flex: 1;
}

.dl-card-info strong {
    display: block;
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.dl-card-info p {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 10px;
    line-height: 1.4;
}

.dl-files-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 8px;
}

.dl-file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 8px 10px;
    background: #f8fafc;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 0.78rem;
    font-weight: 600;
    transition: background 0.15s, border-color 0.15s;
}

.dl-file-item:hover {
    background: #eff6ff;
    border-color: #3b82f6;
    color: #1d4ed8;
}

.dl-file-item .file-action {
    font-weight: 700;
    color: #059669;
    white-space: nowrap;
}

/* ==========================================================================
   ENHANCED IN-APP MODUL AJAR & PANDUAN PRAKTIKUM READERS
   ========================================================================== */
.modul-cinema-card, .guide-cinema-card {
    background: #ffffff;
    border: 2px solid #cbd5e1;
    border-radius: var(--radius-md);
    padding: 16px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.guide-reader-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    flex-wrap: wrap;
    gap: 10px;
}

.guide-reader-title {
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--text-primary);
}

.guide-reader-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.guide-page-badge, .modul-page-chip {
    padding: 5px 12px;
    border-radius: var(--radius-pill);
    background: #f1f5f9;
    border: 1px solid #cbd5e1;
    font-size: 0.82rem;
    font-weight: 700;
    color: #334155;
}

.modul-display-frame, .guide-img-display-frame {
    position: relative;
    background: #0f172a;
    border-radius: var(--radius-md);
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 480px;
    max-height: 720px;
    box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.4);
}

.modul-display-frame img, .guide-img-display-frame img {
    max-width: 100%;
    max-height: 700px;
    object-fit: contain;
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.modul-thumb-strip, .guide-thumb-strip {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    padding: 12px 4px 4px 4px;
    scrollbar-width: thin;
}

.modul-thumb-item, .guide-thumb-item {
    flex: 0 0 75px;
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    border: 2px solid transparent;
    border-radius: 6px;
    padding: 3px;
    background: #f8fafc;
    transition: transform 0.15s, border-color 0.15s;
}

.modul-thumb-item:hover, .guide-thumb-item:hover {
    transform: translateY(-2px);
    border-color: #3b82f6;
}

.modul-thumb-item.active, .guide-thumb-item.active {
    border-color: #059669;
    background: #ecfdf5;
    box-shadow: 0 0 0 2px rgba(5, 150, 105, 0.25);
    transform: scale(1.05);
}

.modul-thumb-item img, .guide-thumb-item img {
    width: 100%;
    height: 95px;
    object-fit: cover;
    border-radius: 4px;
}

.modul-thumb-item span, .guide-thumb-item span {
    font-size: 0.72rem;
    font-weight: 700;
    color: #475569;
    margin-top: 4px;
}

.guide-bottom-action-row {
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px dashed #cbd5e1;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

/* ==========================================================================
   LKPD TABLE & BUTTON STYLING
   ========================================================================== */
.lkpd-section-block {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: var(--radius-md);
    padding: 14px;
    margin-bottom: 16px;
}

.lkpd-section-title {
    font-size: 0.95rem;
    font-weight: 800;
    color: #0f172a;
    margin-bottom: 10px;
}

.lkpd-in {
    width: 100%;
    padding: 6px 8px;
    border: 1px solid #cbd5e1;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 600;
    background: #ffffff;
}

.lkpd-in:focus {
    border-color: #059669;
    outline: none;
    box-shadow: 0 0 0 2px rgba(5, 150, 105, 0.2);
}

.formula-chip {
    padding: 3px 8px;
    background: #e0f2fe;
    border: 1px solid #7dd3fc;
    border-radius: 4px;
    font-size: 0.78rem;
    font-weight: 700;
    color: #0369a1;
}

.btn-del-row {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: #fee2e2;
    border: 1px solid #fca5a5;
    color: #b91c1c;
    font-weight: 800;
    font-size: 0.75rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s;
}

.btn-del-row:hover {
    background: #ef4444;
    color: white;
}

/* Dimension & Gravity chip buttons */
.dim-btn-chip, .grav-btn-chip {
    padding: 6px 12px;
    font-size: 0.82rem;
    font-weight: 700;
    border-radius: var(--radius-pill);
    border: 1.5px solid #cbd5e1;
    background: #ffffff;
    color: #334155;
    cursor: pointer;
    transition: all 0.15s;
}

.dim-btn-chip:hover, .grav-btn-chip:hover {
    border-color: #059669;
    background: #f0fdf4;
}

.dim-btn-chip.active, .grav-btn-chip.active {
    background: #059669;
    border-color: #064e3b;
    color: #ffffff;
    box-shadow: 0 2px 6px rgba(5, 150, 105, 0.3);
}

.btn-step-pill {
    padding: 5px 10px;
    font-size: 0.78rem;
    font-weight: 700;
    border-radius: var(--radius-pill);
    border: 1px solid #94a3b8;
    background: #f8fafc;
    color: #1e293b;
    cursor: pointer;
}

.btn-step-pill:hover {
    background: #e2e8f0;
}

/* ==========================================================================
   APP TOAST NOTIFICATION POPUP
   ========================================================================== */
.app-toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: #064e3b;
    color: #ffffff;
    font-family: 'Fredoka', 'Outfit', sans-serif;
    font-size: 0.95rem;
    font-weight: 700;
    padding: 12px 24px;
    border-radius: var(--radius-pill);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25), 0 0 0 2px #10b981;
    z-index: 999999;
    pointer-events: none;
    opacity: 0;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
}

.app-toast.active {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.app-toast.error {
    background: #881337;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25), 0 0 0 2px #f43f5e;
}


/* Zero scroll on cover screen */
.app-viewport-wrapper:has(#screen-cover.active),
body.game-theme.on-cover .app-viewport-wrapper {
    padding: 0 !important;
    max-width: 100% !important;
}

/* ==========================================================================
   IN-APP SIMULATOR IFRAME HOLDERS & OLABS / PHET BRIDGES
   ========================================================================== */
.sim-iframe-holder {
    width: 100%;
    height: 520px;
    background: #000000;
    border-radius: var(--radius-md);
    overflow: hidden;
    position: relative;
    border: 2px solid #0f172a;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    margin-bottom: 12px;
}

.sim-iframe-holder iframe {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
}

.sim-sub-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 14px;
    padding: 10px 14px;
    background: #f8fafc;
    border-radius: var(--radius-md);
    border: 1.5px solid #e2e8f0;
}

.hub-status-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 6px;
}

.btn-mini-launch {
    padding: 6px 14px;
    background: #0284c7;
    color: #ffffff;
    font-size: 0.82rem;
    font-weight: 700;
    border: none;
    border-radius: var(--radius-pill);
    cursor: pointer;
    box-shadow: 0 2px 0 #0369a1;
    transition: all 0.15s;
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.btn-mini-launch:hover {
    background: #0369a1;
    transform: translateY(-1px);
}

.btn-mini-launch:active {
    transform: translateY(1px);
    box-shadow: none;
}

.btn-olabs-direct {
    background: #0284c7 !important;
    color: #ffffff !important;
    border-color: #0369a1 !important;
}

.btn-olabs-direct:hover {
    background: #0369a1 !important;
}

.olabs-helper-card {
    display: flex;
    align-items: center;
    gap: 14px;
    background: #f0fdf4;
    border: 1.5px solid #86efac;
    border-radius: var(--radius-md);
    padding: 12px 16px;
    margin-top: 8px;
    margin-bottom: 10px;
}

.olabs-helper-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.olabs-helper-content h4 {
    margin: 0 0 4px;
    font-size: 0.95rem;
    color: #14532d;
    font-weight: 800;
}

.olabs-helper-content p {
    margin: 0 0 8px;
    font-size: 0.82rem;
    color: #166534;
    line-height: 1.4;
}

.olabs-helper-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* ==========================================================================
   CLEAN SINGLE-ROW SIMULATOR TOOLBAR
   ========================================================================== */
.sim-clean-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 8px;
    padding: 6px 10px;
    background: #f8fafc;
    border-radius: var(--radius-md);
    border: 1.5px solid #cbd5e1;
}

.sim-mode-chips {
    display: flex;
    gap: 6px;
    align-items: center;
}

.sim-mode-chips .chip-btn {
    padding: 5px 12px;
    font-size: 0.8rem;
    font-weight: 700;
    border-radius: 6px;
    border: 1.5px solid #cbd5e1;
    background: #ffffff;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.15s;
}

.sim-mode-chips .chip-btn.active {
    background: #059669;
    color: #ffffff;
    border-color: #047857;
    box-shadow: 0 2px 4px rgba(5, 150, 105, 0.2);
}

.btn-orient-toggle {
    background: #fef3c7 !important;
    border-color: #d97706 !important;
    color: #92400e !important;
    font-weight: 800 !important;
    cursor: pointer;
}

.btn-orient-toggle:hover {
    background: #fde68a !important;
}

/* ==========================================================================
   COMPREHENSIVE RESPONSIVE SUITE (TABLET & MOBILE PORTRAIT + LANDSCAPE)
   ========================================================================== */
@media (max-width: 820px) {
    .app-navbar {
        padding: 6px 12px;
        margin-bottom: 10px;
        border-radius: 10px;
    }
    .nav-brand-icon {
        font-size: 1.5rem;
    }
    .nav-app-name {
        font-size: 1rem;
    }
    .nav-app-sub {
        font-size: 0.68rem;
    }
    .nav-student-chip {
        padding: 3px 8px;
        font-size: 0.78rem;
    }
    .nav-action-btn, .nav-icon-btn {
        height: 32px;
        padding: 0 8px;
        font-size: 0.78rem;
    }
    .sim-iframe-holder {
        height: 480px;
    }
}

@media (max-width: 640px) {
    /* Mobile Navbar */
    .app-navbar {
        padding: 5px 8px;
        margin-bottom: 8px;
        border-radius: 8px;
        gap: 6px;
    }
    .nav-brand-icon {
        font-size: 1.3rem;
    }
    .nav-app-name {
        font-size: 0.88rem;
        line-height: 1.1;
    }
    .nav-app-sub {
        display: none;
    }
    .nav-right {
        gap: 4px;
    }
    .nav-student-chip {
        padding: 2px 6px;
        font-size: 0.72rem;
        max-width: 105px;
    }
    .chip-name {
        max-width: 70px;
    }
    .nav-action-btn span:not(.btn-icon) {
        display: none;
    }
    .nav-action-btn, .nav-icon-btn {
        height: 28px;
        padding: 0 6px;
        font-size: 0.75rem;
        border-radius: 6px;
    }

    /* Virtual Lab Inner Stage & Toolbar */
    .inner-stage {
        padding: 6px;
    }
    .inner-toolbar {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        gap: 6px;
        margin-bottom: 8px;
    }
    .btn-back-pill {
        padding: 5px 10px;
        font-size: 0.75rem;
        border-radius: 6px;
    }
    .sub-badge {
        font-size: 0.72rem;
        padding: 4px 8px;
        border-radius: 6px;
    }

    /* Domain Tabs (Horizontal Swipe) */
    .lab-tab-chips {
        display: flex;
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        gap: 5px;
        padding: 2px 2px 6px 2px;
        margin-bottom: 6px;
        scrollbar-width: none;
    }
    .lab-tab-chips::-webkit-scrollbar {
        display: none;
    }
    .lab-chip-btn {
        flex-shrink: 0;
        padding: 5px 10px;
        font-size: 0.75rem;
        border-radius: 6px;
        white-space: nowrap;
    }

    /* Clean Simulator Bar on Mobile */
    .sim-clean-bar {
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
        margin-bottom: 6px;
        padding: 5px 6px;
    }
    .sim-mode-chips {
        display: flex;
        width: 100%;
        gap: 4px;
    }
    .sim-mode-chips .chip-btn {
        flex: 1;
        text-align: center;
        padding: 5px 6px;
        font-size: 0.72rem;
        border-radius: 6px;
        white-space: nowrap;
    }
    .sim-actions-row {
        display: flex;
        gap: 4px;
        width: 100%;
    }
    .sim-actions-row .btn-tool-pill {
        flex: 1;
        min-width: 0;
        padding: 5px 2px;
        font-size: 0.66rem;
        border-radius: 6px;
        justify-content: center;
        text-align: center;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    /* Frame container */
    .sim-iframe-holder {
        height: 440px;
        border-radius: 6px;
        margin-bottom: 6px;
    }
}

/* Extra Small Phones (iPhone SE / width < 380px) */
@media (max-width: 380px) {
    .sim-iframe-holder {
        height: 400px;
    }
    .nav-student-chip {
        display: none;
    }
    .sim-mode-chips .chip-btn {
        font-size: 0.68rem;
        padding: 4px;
    }
}

/* Mobile Landscape Mode (Maximizes Simulator Canvas Visibility) */
@media (orientation: landscape) and (max-height: 520px) {
    .app-navbar {
        display: none !important;
    }
    .app-viewport-wrapper {
        padding: 2px 4px !important;
    }
    .inner-stage {
        padding: 2px !important;
    }
    .inner-toolbar {
        margin-bottom: 2px !important;
    }
    .inner-toolbar .sub-badge {
        display: none !important;
    }
    .btn-back-pill {
        padding: 3px 8px !important;
        font-size: 0.7rem !important;
    }
    .lab-tab-chips {
        margin-bottom: 2px !important;
        padding-bottom: 1px !important;
    }
    .lab-chip-btn {
        padding: 3px 8px !important;
        font-size: 0.72rem !important;
    }
    .sim-clean-bar {
        margin-bottom: 2px !important;
        padding: 3px 6px !important;
    }
    .sim-iframe-holder {
        height: 85vh !important;
        min-height: 280px;
        margin-bottom: 0 !important;
        border-width: 1.5px !important;
    }
}

/* In-App Simulated / Forced Device Landscape Mode (Toggle via Button) */
.app-viewport-wrapper.device-landscape-mode {
    max-width: 100% !important;
    padding: 2px 6px !important;
}

.app-viewport-wrapper.device-landscape-mode .app-navbar {
    display: none !important;
}

.app-viewport-wrapper.device-landscape-mode .inner-toolbar {
    margin-bottom: 3px !important;
}

.app-viewport-wrapper.device-landscape-mode .inner-toolbar .sub-badge {
    display: none !important;
}

.app-viewport-wrapper.device-landscape-mode .btn-back-pill {
    padding: 3px 8px !important;
    font-size: 0.72rem !important;
}

.app-viewport-wrapper.device-landscape-mode .lab-tab-chips {
    margin-bottom: 3px !important;
    padding-bottom: 1px !important;
}

.app-viewport-wrapper.device-landscape-mode .lab-chip-btn {
    padding: 3px 8px !important;
    font-size: 0.72rem !important;
}

.app-viewport-wrapper.device-landscape-mode .sim-clean-bar {
    margin-bottom: 3px !important;
    padding: 3px 6px !important;
}

.app-viewport-wrapper.device-landscape-mode .sim-iframe-holder {
    height: clamp(340px, 80vh, 600px) !important;
    margin-bottom: 2px !important;
}