/* ===================================================
   بوابة اللياقة البدنية والتربية الصحية - الصف الثالث ثانوي
   تصميم عصري رياضي متجاوب | دعم كامل للوضع الليلي والنهاري
   =================================================== */

:root {
    --primary: #10b981;
    --primary-dark: #059669;
    --primary-light: #34d399;
    --secondary: #2563eb;
    --secondary-dark: #1d4ed8;
    --accent: #f59e0b;
    --accent-orange: #f97316;
    --danger: #ef4444;
    --success: #10b981;

    /* Theme colors: Dark Mode (Default) */
    --bg-main: #0b0f19;
    --bg-surface: #111827;
    --bg-card: #1f2937;
    --bg-alt: #0d1322;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-highlight: rgba(16, 185, 129, 0.3);
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
    --card-glow: 0 0 25px rgba(16, 185, 129, 0.15);
    --nav-bg: rgba(11, 15, 25, 0.85);

    --font-main: 'Cairo', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
    --bg-main: #f8fafc;
    --bg-surface: #ffffff;
    --bg-card: #ffffff;
    --bg-alt: #f1f5f9;
    --border-color: #e2e8f0;
    --border-highlight: rgba(16, 185, 129, 0.5);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.07), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    --card-glow: 0 0 20px rgba(16, 185, 129, 0.1);
    --nav-bg: rgba(255, 255, 255, 0.88);
}

/* Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-main);
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Scroll Progress Bar */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    width: 0%;
    z-index: 1000;
    transition: width 0.1s ease-out;
}

/* Container */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* Typography & Badges */
h1, h2, h3, h4, h5 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-primary);
}

p {
    color: var(--text-secondary);
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-light) 0%, #38bdf8 50%, #818cf8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(16, 185, 129, 0.12);
    color: var(--primary-light);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.88rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.badge-accent {
    background: rgba(245, 158, 11, 0.12);
    color: var(--accent);
    border-color: rgba(245, 158, 11, 0.3);
}

.section-header {
    text-align: center;
    max-width: 750px;
    margin: 0 auto 48px auto;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
}

.section {
    padding: 90px 0;
    position: relative;
}

.bg-alt {
    background-color: var(--bg-alt);
}

.bg-lab {
    background: radial-gradient(circle at 50% 30%, rgba(37, 99, 235, 0.08) 0%, var(--bg-main) 70%);
}

.bg-card {
    background: linear-gradient(180deg, var(--bg-alt) 0%, var(--bg-main) 100%);
}

/* ===================================================
   Buttons & Interactions
   =================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-size: 0.98rem;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all var(--transition-fast);
}

.btn svg {
    width: 20px;
    height: 20px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-dark) 100%);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.35);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1.5px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(16, 185, 129, 0.05);
}

.btn-icon {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-icon:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(16, 185, 129, 0.1);
}

.btn-icon svg {
    width: 20px;
    height: 20px;
}

/* ===================================================
   Header & Navbar
   =================================================== */
.navbar {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 999;
    transition: all var(--transition-fast);
}

.nav-container {
    width: 90%;
    max-width: 1250px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 75px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.logo-icon svg {
    width: 24px;
    height: 24px;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-title {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text-primary);
}

.logo-badge {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary-light);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.92rem;
    font-weight: 600;
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-light);
}

.nav-highlight {
    background: rgba(16, 185, 129, 0.12);
    color: var(--primary-light) !important;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.mobile-menu-btn {
    display: none;
}

/* Theme Icons switch */
[data-theme="light"] .icon-moon {
    display: block;
}
[data-theme="light"] .icon-sun {
    display: none;
}
[data-theme="dark"] .icon-moon,
:not([data-theme="light"]) .icon-moon {
    display: none;
}
[data-theme="dark"] .icon-sun,
:not([data-theme="light"]) .icon-sun {
    display: block;
}

/* ===================================================
   Hero Section
   =================================================== */
.hero-section {
    position: relative;
    padding: 70px 0 90px 0;
    overflow: hidden;
}

.hero-glow {
    position: absolute;
    top: -150px;
    right: 15%;
    width: 450px;
    height: 450px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.2) 0%, rgba(37, 99, 235, 0.05) 50%, transparent 70%);
    border-radius: 50%;
    filter: blur(60px);
    pointer-events: none;
    z-index: 0;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 40px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: rgba(37, 99, 235, 0.12);
    border: 1px solid rgba(37, 99, 235, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 700;
    color: #60a5fa;
    margin-bottom: 18px;
}

.tag-pulse {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--primary);
    box-shadow: 0 0 10px var(--primary);
    animation: pulseGlow 1.8s infinite;
}

@keyframes pulseGlow {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(1.3); }
}

.hero-title {
    font-size: 3rem;
    font-weight: 900;
    line-height: 1.25;
    margin-bottom: 20px;
}

.hero-description {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
    max-width: 580px;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 40px;
}

.hero-metrics {
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 16px 20px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--card-shadow);
    max-width: 580px;
}

.metric-item {
    display: flex;
    flex-direction: column;
}

.metric-num {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--primary-light);
}

.metric-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.metric-divider {
    width: 1px;
    height: 32px;
    background: var(--border-color);
}

/* Hero Glass Graphic */
.card-hero-glass {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    overflow: hidden;
    position: relative;
}

.glass-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 18px;
    background: rgba(0, 0, 0, 0.15);
    border-bottom: 1px solid var(--border-color);
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #10b981; }

.glass-title {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-secondary);
    margin-right: 6px;
}

.glass-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.vital-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.vital-card:hover {
    border-color: var(--border-highlight);
    transform: translateX(-4px);
}

.vital-icon {
    width: 46px;
    height: 46px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.heart-pulse {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
}

.oxygen-flow {
    background: rgba(56, 189, 248, 0.15);
    color: #38bdf8;
}

.target-hit {
    background: rgba(16, 185, 129, 0.15);
    color: #10b981;
}

.vital-icon svg {
    width: 24px;
    height: 24px;
}

.vital-info {
    display: flex;
    flex-direction: column;
}

.vital-name {
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.vital-val {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text-primary);
}

.vital-val small {
    font-size: 0.75rem;
    font-weight: normal;
    color: var(--text-muted);
}

.interactive-quote {
    padding: 14px;
    border-right: 3px solid var(--primary);
    background: rgba(16, 185, 129, 0.05);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.interactive-quote blockquote {
    font-size: 0.88rem;
    font-style: italic;
    color: var(--text-secondary);
}

/* ===================================================
   Section 1: Concepts Grid
   =================================================== */
.concepts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 28px;
}

.concept-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px 26px;
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.concept-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-highlight);
}

.concept-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.concept-icon svg {
    width: 26px;
    height: 26px;
}

.color-blue {
    background: rgba(37, 99, 235, 0.15);
    color: #3b82f6;
}

.color-green {
    background: rgba(16, 185, 129, 0.15);
    color: #10b981;
}

.color-orange {
    background: rgba(249, 115, 22, 0.15);
    color: #f97316;
}

.concept-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.concept-card p {
    font-size: 0.95rem;
    margin-bottom: 16px;
}

.concept-features {
    list-style: none;
    border-top: 1px solid var(--border-color);
    padding-top: 14px;
}

.concept-features li {
    font-size: 0.88rem;
    color: var(--text-secondary);
    position: relative;
    padding-right: 18px;
    margin-bottom: 6px;
}

.concept-features li::before {
    content: "✓";
    position: absolute;
    right: 0;
    color: var(--primary);
    font-weight: bold;
}

/* ===================================================
   Section 2: Elements Switcher & Grid
   =================================================== */
.tabs-control {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
}

.tab-btn {
    padding: 12px 28px;
    border-radius: var(--radius-full);
    border: 1.5px solid var(--border-color);
    background: var(--bg-surface);
    color: var(--text-secondary);
    font-size: 0.96rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tab-btn:hover {
    border-color: var(--primary);
    color: var(--primary-light);
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #ffffff;
    border-color: transparent;
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
}

.tab-pane {
    display: none;
    animation: fadeIn 0.4s ease-in-out;
}

.tab-pane.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.elements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.element-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    position: relative;
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.element-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-highlight);
}

.element-badge {
    position: absolute;
    top: 18px;
    left: 18px;
    font-size: 0.75rem;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    background: rgba(16, 185, 129, 0.12);
    color: var(--primary-light);
    font-weight: 700;
}

.skill-card .element-badge {
    background: rgba(37, 99, 235, 0.12);
    color: #60a5fa;
}

.element-icon {
    font-size: 2.2rem;
    margin-bottom: 12px;
}

.element-card h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.element-desc {
    font-size: 0.92rem;
    margin-bottom: 16px;
    min-height: 55px;
}

.element-test {
    padding: 10px 12px;
    background: rgba(0, 0, 0, 0.12);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    border-right: 3px solid var(--primary);
}

.skill-card .element-test {
    border-right-color: var(--secondary);
}

/* ===================================================
   Section 3: FITT Formula Cards
   =================================================== */
.fitt-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 45px;
}

.fitt-letter-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 26px 20px;
    text-align: center;
    position: relative;
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-fast);
}

.fitt-letter-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
}

.fitt-badge {
    width: 60px;
    height: 60px;
    margin: 0 auto 16px auto;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: 900;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.fitt-letter-card h3 {
    font-size: 1.25rem;
    margin-bottom: 4px;
}

.fitt-sub {
    display: block;
    font-size: 0.82rem;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 14px;
}

.fitt-letter-card p {
    font-size: 0.9rem;
    text-align: right;
}

.principles-box {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 34px;
    box-shadow: var(--card-shadow);
}

.box-title {
    font-size: 1.4rem;
    text-align: center;
    margin-bottom: 30px;
    color: var(--primary-light);
}

.principles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.principle-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    position: relative;
}

.p-num {
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--primary-light);
    opacity: 0.35;
    margin-bottom: 6px;
}

.principle-item h4 {
    font-size: 1.05rem;
    margin-bottom: 8px;
}

.principle-item p {
    font-size: 0.88rem;
}

/* ===================================================
   Section 4: Interactive Fitness Lab
   =================================================== */
.lab-wrapper {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    padding: 32px;
}

.lab-tabs {
    display: flex;
    gap: 12px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 18px;
    margin-bottom: 28px;
    overflow-x: auto;
}

.lab-tab-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.94rem;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
    transition: var(--transition-fast);
}

.lab-tab-btn svg {
    width: 18px;
    height: 18px;
}

.lab-tab-btn:hover {
    color: var(--primary-light);
    border-color: var(--primary);
}

.lab-tab-btn.active {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #ffffff;
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.lab-pane {
    display: none;
}

.lab-pane.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

.calc-card {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 36px;
    align-items: start;
}

.calc-form h3 {
    font-size: 1.3rem;
    margin-bottom: 6px;
}

.calc-help {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.calc-help code {
    background: rgba(0, 0, 0, 0.2);
    padding: 3px 8px;
    border-radius: 4px;
    color: var(--primary-light);
    font-size: 0.85rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    margin-bottom: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-secondary);
}

.form-group input {
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    outline: none;
    transition: var(--transition-fast);
}

.form-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

.form-actions {
    margin-top: 10px;
}

/* Lab Results Box */
.calc-result {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 26px;
    min-height: 280px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
}

.result-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.calc-icon-large {
    font-size: 3rem;
}

.result-placeholder h4 {
    font-size: 1.05rem;
    color: var(--text-primary);
}

.result-placeholder p {
    font-size: 0.88rem;
    max-width: 320px;
}

.hidden {
    display: none !important;
}

/* BMI Result Details */
.result-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

.result-score-circle {
    width: 110px;
    height: 110px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.2) 0%, transparent 70%);
    border: 3px solid var(--primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
}

.score-number {
    font-size: 2.1rem;
    font-weight: 900;
    color: var(--primary-light);
    line-height: 1;
}

.score-unit {
    font-size: 0.72rem;
    color: var(--text-muted);
}

.result-badge {
    padding: 6px 18px;
    border-radius: var(--radius-full);
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 18px;
    background: rgba(16, 185, 129, 0.15);
    color: var(--primary-light);
    border: 1px solid var(--primary);
}

.gauge-bar-wrapper {
    width: 100%;
    max-width: 320px;
    margin-bottom: 16px;
    position: relative;
}

.gauge-bar {
    display: flex;
    height: 10px;
    border-radius: var(--radius-full);
    overflow: hidden;
}

.gauge-segment {
    flex: 1;
}

.seg-under { background: #38bdf8; }
.seg-normal { background: #10b981; }
.seg-over { background: #f59e0b; }
.seg-obese { background: #ef4444; }

.gauge-pointer {
    position: absolute;
    top: 12px;
    left: 45%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    color: var(--text-primary);
    transition: left 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.result-advice {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-top: 10px;
}

/* THR Result Details */
.thr-summary {
    width: 100%;
    margin-bottom: 16px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border-color);
}

.thr-stat {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.stat-label {
    font-size: 0.92rem;
    color: var(--text-secondary);
}

.stat-value {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--primary-light);
}

.zones-list {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 10px;
    text-align: right;
}

.zone-item {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    transition: var(--transition-fast);
}

.zone-item.active-zone {
    border-color: var(--primary);
    background: rgba(16, 185, 129, 0.08);
}

.zone-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
}

.zone-tag {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--primary-light);
}

.zone-range {
    font-size: 0.88rem;
    font-weight: 800;
    color: var(--text-primary);
}

.zone-title {
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 2px;
}

.zone-desc {
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* Water Calculator Results */
.water-card-result {
    width: 100%;
    text-align: center;
}

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

.water-amount {
    font-size: 2.4rem;
    font-weight: 900;
    color: #38bdf8;
    margin: 8px 0;
}

.water-cups {
    font-size: 0.92rem;
    color: var(--text-secondary);
    margin-bottom: 18px;
}

.water-cups strong {
    color: #38bdf8;
    font-size: 1.15rem;
}

.hydration-tips {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 14px;
    text-align: right;
}

.hydration-tips h5 {
    font-size: 0.88rem;
    margin-bottom: 8px;
    color: var(--primary-light);
}

.hydration-tips ul {
    list-style: none;
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.hydration-tips li {
    margin-bottom: 4px;
}

/* ===================================================
   Section 5: Weekly Exercise Plan
   =================================================== */
.plan-header-alert {
    background: rgba(37, 99, 235, 0.12);
    border: 1px solid rgba(37, 99, 235, 0.3);
    border-radius: var(--radius-md);
    padding: 12px 20px;
    color: #60a5fa;
    font-size: 0.92rem;
    font-weight: 600;
    margin-bottom: 24px;
    text-align: center;
}

.schedule-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
}

.day-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: var(--card-shadow);
    transition: var(--transition-fast);
}

.day-card:hover {
    border-color: var(--border-highlight);
    transform: translateY(-2px);
}

.day-card.completed {
    border-color: var(--primary);
    background: rgba(16, 185, 129, 0.05);
}

.day-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.day-name {
    font-size: 1.15rem;
    font-weight: 800;
}

.day-type {
    font-size: 0.72rem;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: var(--radius-full);
}

.badge-aerobic { background: rgba(56, 189, 248, 0.15); color: #38bdf8; }
.badge-strength { background: rgba(249, 115, 22, 0.15); color: #f97316; }
.badge-rest { background: rgba(168, 85, 247, 0.15); color: #c084fc; }
.badge-sport { background: rgba(16, 185, 129, 0.15); color: #10b981; }

.day-body h4 {
    font-size: 1rem;
    margin-bottom: 6px;
}

.day-body p {
    font-size: 0.88rem;
    margin-bottom: 4px;
}

.day-footer {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

.check-task {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--text-secondary);
    user-select: none;
}

.check-task input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
    cursor: pointer;
}

/* ===================================================
   Section 6: Tips & Safety Grid
   =================================================== */
.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.tip-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 26px 22px;
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-fast);
}

.tip-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-highlight);
}

.tip-icon {
    font-size: 2.2rem;
    margin-bottom: 12px;
}

.tip-card h3 {
    font-size: 1.15rem;
    margin-bottom: 8px;
}

.tip-card p {
    font-size: 0.9rem;
}

/* ===================================================
   Section 7: Interactive Quiz
   =================================================== */
.quiz-wrapper {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    max-width: 820px;
    margin: 0 auto;
    padding: 36px;
}

.quiz-progress-bar {
    height: 8px;
    background: var(--bg-card);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: 14px;
}

.quiz-progress-fill {
    height: 100%;
    background: linear-gradient(to left, var(--primary), var(--secondary));
    transition: width 0.3s ease;
}

.quiz-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.88rem;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 24px;
}

.quiz-question {
    font-size: 1.3rem;
    font-weight: 800;
    margin-bottom: 22px;
    line-height: 1.5;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 24px;
}

.quiz-option-btn {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 15px 20px;
    background: var(--bg-card);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.98rem;
    font-weight: 600;
    text-align: right;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.quiz-option-btn:hover:not([disabled]) {
    border-color: var(--primary);
    background: rgba(16, 185, 129, 0.08);
    transform: translateX(-4px);
}

.option-letter {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.quiz-option-btn.correct {
    background: rgba(16, 185, 129, 0.15) !important;
    border-color: var(--success) !important;
    color: #34d399 !important;
}

.quiz-option-btn.wrong {
    background: rgba(239, 68, 68, 0.15) !important;
    border-color: var(--danger) !important;
    color: #f87171 !important;
}

.quiz-feedback {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    font-size: 0.92rem;
    animation: fadeIn 0.3s ease;
}

.quiz-feedback.correct-feedback {
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #34d399;
}

.quiz-feedback.wrong-feedback {
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}

.quiz-actions {
    display: flex;
    justify-content: flex-end;
}

.quiz-completion {
    text-align: center;
    padding: 30px 10px;
}

.trophy-icon {
    font-size: 4rem;
    margin-bottom: 12px;
    animation: bounce 1s infinite alternate;
}

@keyframes bounce {
    from { transform: translateY(0); }
    to { transform: translateY(-10px); }
}

.quiz-completion h3 {
    font-size: 1.8rem;
    margin-bottom: 10px;
}

.completion-score {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.completion-score strong {
    font-size: 1.8rem;
    color: var(--primary-light);
}

.completion-msg {
    font-size: 1.05rem;
    color: var(--text-muted);
    margin-bottom: 28px;
}

/* ===================================================
   Section 8: Official Student Project Card
   =================================================== */
.project-card-container {
    max-width: 850px;
    margin: 0 auto;
}

.official-card {
    background: var(--bg-surface);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--card-shadow);
    position: relative;
    overflow: hidden;
}

.official-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(to right, var(--primary), var(--secondary), var(--accent));
}

.official-card-top {
    display: flex;
    align-items: center;
    gap: 20px;
    border-bottom: 2px dashed var(--border-color);
    padding-bottom: 24px;
    margin-bottom: 28px;
}

.official-emblem {
    width: 65px;
    height: 65px;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(37, 99, 235, 0.15));
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-light);
}

.official-emblem svg {
    width: 36px;
    height: 36px;
}

.official-titles h3 {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.official-titles h4 {
    font-size: 1rem;
    color: var(--primary-light);
    margin-bottom: 2px;
}

.project-year {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.official-fields {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

.field-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.field-item.full-width {
    grid-column: 1 / -1;
}

.field-label {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text-muted);
}

.editable-input {
    padding: 10px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.98rem;
    font-weight: 700;
    outline: none;
    transition: var(--transition-fast);
}

.editable-input:focus {
    border-color: var(--primary);
    background: var(--bg-surface);
}

.field-static-val {
    padding: 10px 14px;
    background: rgba(0, 0, 0, 0.15);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-sign-area {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.sign-block {
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 0.88rem;
    color: var(--text-muted);
}

.sign-line {
    font-size: 1.2rem;
    font-weight: 800;
    font-family: cursive, var(--font-main);
    color: var(--primary-light);
    border-bottom: 1.5px solid var(--text-muted);
    padding-bottom: 4px;
    min-width: 140px;
}

.grade-box {
    padding: 8px 18px;
    border: 1.5px solid var(--primary);
    border-radius: var(--radius-sm);
    color: var(--primary-light);
    font-weight: 800;
    background: rgba(16, 185, 129, 0.08);
}

.card-controls {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-top: 26px;
}

/* ===================================================
   Footer
   =================================================== */
.footer {
    background: var(--bg-surface);
    border-top: 1px solid var(--border-color);
    padding-top: 60px;
}

.footer-container {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
    gap: 36px;
    padding-bottom: 50px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
}

.footer-logo-title {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--text-primary);
}

.footer-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.footer-col h4 {
    font-size: 1.05rem;
    margin-bottom: 18px;
    color: var(--primary-light);
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-light);
    padding-right: 4px;
}

.footer-references {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.8;
}

.footer-bottom {
    background: rgba(0, 0, 0, 0.25);
    padding: 20px 0;
    border-top: 1px solid var(--border-color);
}

.footer-bottom-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.back-to-top {
    text-decoration: none;
    color: var(--primary-light);
    font-weight: 700;
}

/* ===================================================
   Responsive Mobile Media Queries
   =================================================== */
@media (max-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-metrics {
        justify-content: center;
        width: 100%;
    }

    .calc-card {
        grid-template-columns: 1fr;
    }

    .footer-container {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 75px;
        left: 0;
        right: 0;
        background: var(--bg-surface);
        border-bottom: 1px solid var(--border-color);
        flex-direction: column;
        padding: 20px;
        gap: 10px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.2);
    }

    .nav-links.show {
        display: flex;
    }

    .mobile-menu-btn {
        display: inline-flex;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .tabs-control {
        flex-direction: column;
    }

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

    .official-fields {
        grid-template-columns: 1fr;
    }

    .footer-container {
        grid-template-columns: 1fr;
    }

    .footer-bottom-inner {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
}

/* ===================================================
   Styles for Media, Male Fitness Photos & Video Embeds
   =================================================== */
.lesson-media-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin: 30px 0;
}

.lesson-media-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.lesson-media-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.photo-container {
    position: relative;
    width: 100%;
    height: 220px;
    overflow: hidden;
    background: #111827;
}

.photo-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.lesson-media-card:hover .photo-container img {
    transform: scale(1.05);
}

.photo-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: rgba(11, 15, 25, 0.85);
    backdrop-filter: blur(6px);
    color: var(--primary-light);
    font-size: 0.8rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-highlight);
    display: flex;
    align-items: center;
    gap: 6px;
}

.photo-info {
    padding: 18px 20px;
}

.photo-info h4 {
    font-size: 1.1rem;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.photo-info p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Video Section & Cards */
.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    margin-top: 30px;
}

.video-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    display: flex;
    flex-direction: column;
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
    height: 0;
    overflow: hidden;
    background: #000;
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.video-content {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.video-tag {
    display: inline-block;
    background: rgba(37, 99, 235, 0.15);
    color: #60a5fa;
    border: 1px solid rgba(37, 99, 235, 0.3);
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 10px;
    width: fit-content;
}

.video-content h4 {
    font-size: 1.15rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.video-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 14px;
}

.video-actions {
    margin-top: auto;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

.btn-yt {
    background: #dc2626;
    color: #ffffff !important;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 700;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: background 0.2s ease, transform 0.2s ease;
    box-shadow: 0 2px 8px rgba(220, 38, 38, 0.3);
}

.btn-yt:hover {
    background: #b91c1c;
    transform: translateY(-2px);
}

.btn-ien {
    background: #059669;
    color: #ffffff !important;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 700;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: background 0.2s ease;
}

.btn-ien:hover {
    background: #047857;
}

.video-notice-box {
    background: rgba(37, 99, 235, 0.08);
    border: 1px solid rgba(37, 99, 235, 0.3);
    border-radius: var(--radius-md);
    padding: 14px 20px;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
    color: var(--text-primary);
}

/* ===================================================
   Interactive Pulse Stopwatch Simulator (محاكي قياس النبض العملي)
   =================================================== */
.pulse-sim-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 26px;
    margin-top: 30px;
    box-shadow: var(--card-shadow);
    text-align: center;
}

.sim-heart-icon {
    font-size: 3rem;
    display: inline-block;
    transition: transform 0.15s ease;
}

.sim-heart-icon.beating {
    animation: heartBeat 0.8s infinite;
}

@keyframes heartBeat {
    0% { transform: scale(1); }
    15% { transform: scale(1.25); }
    30% { transform: scale(1); }
    45% { transform: scale(1.15); }
    60% { transform: scale(1); }
}

.sim-timer-display {
    font-size: 2.4rem;
    font-weight: 900;
    font-family: monospace;
    color: var(--primary);
    margin: 10px 0;
}

.sim-result-text {
    font-size: 1.1rem;
    margin: 15px 0;
    min-height: 30px;
    color: var(--text-primary);
}

.video-link-btn:hover {
    gap: 12px;
    color: var(--primary-light);
}

/* ===================================================
   Checkpoint Micro-Quiz (فكر وأجب - أسئلة مرحلية للطلاب)
   =================================================== */
.checkpoint-box {
    margin-top: 35px;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.06), rgba(37, 99, 235, 0.06));
    border: 1px solid var(--border-highlight);
    border-radius: var(--radius-lg);
    padding: 25px;
    position: relative;
}

.checkpoint-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 15px;
}

.checkpoint-badge {
    background: var(--primary);
    color: #0b0f19;
    font-size: 0.82rem;
    font-weight: 800;
    padding: 4px 12px;
    border-radius: var(--radius-full);
}

.checkpoint-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.checkpoint-question {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.checkpoint-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 16px;
}

.checkpoint-btn {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px 18px;
    text-align: right;
    color: var(--text-primary);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.checkpoint-btn:hover {
    border-color: var(--primary);
    background: rgba(16, 185, 129, 0.08);
}

.checkpoint-btn.correct {
    background: rgba(16, 185, 129, 0.2) !important;
    border-color: #10b981 !important;
    color: #34d399 !important;
    font-weight: 700;
}

.checkpoint-btn.incorrect {
    background: rgba(239, 68, 68, 0.2) !important;
    border-color: #ef4444 !important;
    color: #f87171 !important;
}

.checkpoint-result {
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 0.92rem;
    line-height: 1.5;
    margin-top: 10px;
    display: none;
}

.checkpoint-result.show {
    display: block;
}

.checkpoint-result.success {
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid #10b981;
    color: #34d399;
}

.checkpoint-result.error {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid #ef4444;
    color: #f87171;
}

/* Discussion Bank */
.discussion-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 25px;
}

.discussion-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 22px;
    box-shadow: var(--card-shadow);
    border-top: 4px solid var(--accent);
}

.discussion-icon {
    font-size: 1.8rem;
    margin-bottom: 10px;
}

.discussion-card h4 {
    font-size: 1.05rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.discussion-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ===================================================
   Print Media Styling (For School Submission)
   =================================================== */
@media print {
    body {
        background: #fff !important;
        color: #000 !important;
    }

    .navbar, .scroll-progress, .hero-section, #concepts, #elements,
    #fitt-section, #interactive-lab, #weekly-plan, #safety-nutrition,
    #quiz-section, .footer, .card-controls {
        display: none !important;
    }

    #project-card {
        padding: 0 !important;
    }

    .official-card {
        border: 2px solid #000 !important;
        box-shadow: none !important;
        background: #fff !important;
        color: #000 !important;
        padding: 20px !important;
    }

    .editable-input, .field-static-val {
        border: 1px solid #999 !important;
        background: #fff !important;
        color: #000 !important;
    }

    .official-card::before {
        display: none;
    }
}