/* ==========================================================================
   الدرس التفاعلي: التغطية الدفاعية والهجوم الخاطف في كرة القدم (أول ثانوي)
   إعداد: أ / ثامر بن محمد العمير • المدرسة المركزية بالمنطقة الشرقية
   إدارة: أ / أحمد مصلح الشمراني
   ========================================================================== */

:root {
    --font-main: 'Cairo', system-ui, -apple-system, sans-serif;
    
    /* Dark Theme (Default) */
    --bg-primary: #070d18;
    --bg-secondary: #0c1527;
    --bg-surface: #132238;
    --bg-card: #182842;
    --bg-card-hover: #1f3354;
    
    /* Football Stadium Green Palette */
    --pitch-dark: #043826;
    --pitch-mid: #065f46;
    --pitch-light: #047857;
    --pitch-stripe-1: #064e3b;
    --pitch-stripe-2: #04553f;
    --pitch-lines: rgba(255, 255, 255, 0.88);
    
    /* Brand Accents */
    --primary: #10b981;
    --primary-light: #34d399;
    --primary-dark: #059669;
    --primary-glow: rgba(16, 185, 129, 0.35);
    
    --secondary: #38bdf8;
    --secondary-glow: rgba(56, 189, 248, 0.3);
    
    --accent: #f59e0b;
    --accent-glow: rgba(245, 158, 11, 0.35);
    
    --danger: #ef4444;
    --danger-glow: rgba(239, 68, 68, 0.35);
    
    --warning: #fbbf24;
    --success: #10b981;
    
    /* Text Colors */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    /* Borders & Shadows */
    --border-color: rgba(255, 255, 255, 0.1);
    --border-highlight: rgba(16, 185, 129, 0.45);
    --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
    --card-glow: 0 0 25px rgba(16, 185, 129, 0.15);
    
    /* Radius & Transitions */
    --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-primary: #f8fafc;
    --bg-secondary: #f1f5f9;
    --bg-surface: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f8fafc;
    
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    
    --border-color: rgba(0, 0, 0, 0.1);
    --border-highlight: #10b981;
    --card-shadow: 0 10px 25px rgba(15, 23, 42, 0.08);
    --card-glow: 0 0 20px rgba(16, 185, 129, 0.12);
}

/* Base Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Scroll Progress Bar */
.scroll-progress {
    position: fixed;
    top: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--secondary), var(--primary));
    width: 0%;
    z-index: 9999;
    transition: width 0.1s ease-out;
}

/* Container */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 800;
    line-height: 1.25;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-light), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.gradient-text-gold {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-family: var(--font-main);
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #ffffff;
    box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.45);
}

.btn-secondary {
    background: var(--bg-surface);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--border-highlight);
    background: var(--bg-card);
}

.btn-accent {
    background: linear-gradient(135deg, var(--accent), #d97706);
    color: #ffffff;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(245, 158, 11, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
}

.btn-icon {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    transition: all var(--transition-fast);
    font-size: 1.1rem;
}

.btn-icon:hover {
    border-color: var(--primary);
    background: var(--bg-card);
}

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(7, 13, 24, 0.88);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

[data-theme="light"] .navbar {
    background: rgba(255, 255, 255, 0.9);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

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

.logo-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    box-shadow: 0 4px 12px var(--primary-glow);
    font-size: 1.3rem;
}

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

.logo-title {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.3px;
}

.logo-badge {
    font-size: 0.76rem;
    color: var(--primary-light);
    font-weight: 600;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
    overflow-x: auto;
    scrollbar-width: none;
}

.nav-links::-webkit-scrollbar {
    display: none;
}

.nav-link {
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.nav-link:hover, .nav-link.active {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.08);
}

.nav-link.nav-highlight {
    background: rgba(16, 185, 129, 0.15);
    color: var(--primary-light);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

/* Hero Section */
.hero-section {
    position: relative;
    padding: 70px 0 60px;
    text-align: center;
    overflow: hidden;
    background: radial-gradient(circle at 50% 10%, rgba(16, 185, 129, 0.15), transparent 70%);
}

.hero-glow {
    position: absolute;
    top: -50px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 400px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.25) 0%, rgba(56, 189, 248, 0.1) 60%, transparent 80%);
    filter: blur(80px);
    pointer-events: none;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 18px;
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.86rem;
    font-weight: 700;
    color: var(--primary-light);
    margin-bottom: 22px;
}

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

@keyframes pulse {
    0% { transform: scale(0.9); opacity: 0.7; }
    50% { transform: scale(1.3); opacity: 1; }
    100% { transform: scale(0.9); opacity: 0.7; }
}

/* Teacher Credential Box */
.teacher-credential-box {
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.95), rgba(15, 23, 42, 0.95));
    border: 1px solid rgba(16, 185, 129, 0.35);
    border-radius: var(--radius-lg);
    padding: 24px 30px;
    max-width: 960px;
    margin: 0 auto 36px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4), 0 0 20px rgba(16, 185, 129, 0.15);
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 24px;
    text-align: right;
    position: relative;
    overflow: hidden;
}

[data-theme="light"] .teacher-credential-box {
    background: linear-gradient(135deg, #ffffff, #f1f5f9);
    border-color: rgba(16, 185, 129, 0.4);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
}

.teacher-avatar-emblem {
    width: 72px;
    height: 72px;
    border-radius: 20px;
    background: linear-gradient(135deg, #059669, #0284c7);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.2rem;
    box-shadow: 0 6px 18px rgba(16, 185, 129, 0.3);
    flex-shrink: 0;
}

.teacher-role-tag {
    display: inline-block;
    color: var(--primary-light);
    font-size: 0.84rem;
    font-weight: 800;
    margin-bottom: 4px;
}

.teacher-name-title {
    font-size: 1.55rem;
    font-weight: 900;
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: 6px;
}

.teacher-school-desc {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    font-size: 0.92rem;
    color: var(--text-secondary);
}

.school-director-badge {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px 18px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

[data-theme="light"] .school-director-badge {
    background: #e2e8f0;
}

.director-label {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-weight: 700;
}

.director-name {
    font-size: 1rem;
    font-weight: 800;
    color: var(--text-primary);
    white-space: nowrap;
}

.hero-title {
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: 18px;
    line-height: 1.25;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 860px;
    margin: 0 auto 35px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
    margin-bottom: 50px;
}

/* Quick Stats Bar */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    max-width: 1000px;
    margin: 0 auto;
}

.stat-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 18px 20px;
    display: flex;
    align-items: center;
    gap: 14px;
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-fast);
}

.stat-box:hover {
    transform: translateY(-3px);
    border-color: var(--border-highlight);
}

.stat-icon-wrap {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    flex-shrink: 0;
}

.stat-icon-wrap.green { background: rgba(16, 185, 129, 0.15); color: #34d399; }
.stat-icon-wrap.blue { background: rgba(56, 189, 248, 0.15); color: #38bdf8; }
.stat-icon-wrap.orange { background: rgba(245, 158, 11, 0.15); color: #fbbf24; }
.stat-icon-wrap.purple { background: rgba(168, 85, 247, 0.15); color: #c084fc; }

.stat-number {
    font-size: 1.45rem;
    font-weight: 900;
    line-height: 1.2;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 600;
}

/* Section Common */
.section {
    padding: 80px 0;
    position: relative;
}

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

.section-header {
    text-align: center;
    max-width: 780px;
    margin: 0 auto 50px;
}

.section-tag {
    display: inline-block;
    padding: 4px 14px;
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--primary-light);
    border-radius: var(--radius-full);
    font-size: 0.84rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 900;
    margin-bottom: 14px;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==========================================================================
   INTERACTIVE TACTICAL PITCH SIMULATOR (SVG)
   ========================================================================== */
.tactical-simulator-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow), var(--card-glow);
    padding: 30px;
    margin-bottom: 40px;
}

.tactics-control-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 24px;
}

.tactic-mode-pills {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.tactic-pill-btn {
    padding: 10px 20px;
    border-radius: var(--radius-full);
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-family: var(--font-main);
    font-size: 0.92rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tactic-pill-btn.active, .tactic-pill-btn:hover {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #ffffff;
    border-color: transparent;
    box-shadow: 0 4px 14px var(--primary-glow);
}

.pitch-action-btns {
    display: flex;
    gap: 10px;
}

/* Realistic SVG Pitch Styling */
.pitch-container {
    width: 100%;
    position: relative;
    background: linear-gradient(180deg, #032b1d 0%, #064e3b 100%);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 3px solid rgba(255, 255, 255, 0.4);
    box-shadow: inset 0 0 60px rgba(0, 0, 0, 0.6), 0 12px 30px rgba(0, 0, 0, 0.5);
}

.pitch-svg {
    width: 100%;
    height: auto;
    display: block;
}

.pitch-line {
    stroke: var(--pitch-lines);
    stroke-width: 2.2;
    fill: none;
}

.pitch-dashed-line {
    stroke-dasharray: 6, 6;
}

/* Tactical Player Nodes */
.player-node {
    cursor: pointer;
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.player-node:hover {
    transform: scale(1.25);
    filter: drop-shadow(0 0 10px #ffffff);
}

.tactical-metrics-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
    margin-top: 24px;
}

.metric-item {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.metric-item-title {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--primary-light);
}

.metric-item-value {
    font-size: 1.25rem;
    font-weight: 900;
    color: var(--text-primary);
}

.metric-item-desc {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.player-role-explanation {
    margin-top: 20px;
    padding: 20px;
    background: rgba(16, 185, 129, 0.08);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: var(--radius-md);
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.role-emblem-badge {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: var(--primary);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    flex-shrink: 0;
}

/* ==========================================================================
   TACTICAL CARDS & COMPARISON GRIDS
   ========================================================================== */
.tactics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.tactic-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 30px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    box-shadow: var(--card-shadow);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.tactic-card:hover {
    border-color: var(--border-highlight);
    transform: translateY(-6px);
    box-shadow: var(--card-shadow), var(--card-glow);
}

.tactic-card-header {
    display: flex;
    align-items: center;
    gap: 14px;
}

.tactic-card-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.7rem;
    flex-shrink: 0;
}

.icon-def-1 { background: rgba(239, 68, 68, 0.15); color: #f87171; }
.icon-def-2 { background: rgba(245, 158, 11, 0.15); color: #fbbf24; }
.icon-transition { background: rgba(56, 189, 248, 0.15); color: #38bdf8; }
.icon-finish { background: rgba(16, 185, 129, 0.15); color: #34d399; }

.tactic-card-title {
    font-size: 1.3rem;
    font-weight: 800;
}

.tactic-card-desc {
    font-size: 0.94rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.tactic-steps-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 8px;
}

.tactic-steps-list li {
    position: relative;
    padding-right: 24px;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.tactic-steps-list li::before {
    content: "⚽";
    position: absolute;
    right: 0;
    top: 0;
    font-size: 0.8rem;
}

/* Comparison Table */
.comparison-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 30px;
    overflow-x: auto;
    box-shadow: var(--card-shadow);
}

.custom-table {
    width: 100%;
    border-collapse: collapse;
    text-align: right;
}

.custom-table th, .custom-table td {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
}

.custom-table th {
    background: rgba(255, 255, 255, 0.04);
    font-weight: 800;
    color: var(--primary-light);
    font-size: 0.95rem;
}

.custom-table tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

/* ==========================================================================
   CURATED VIDEO & HISTORIC MOMENTS LIBRARY
   ========================================================================== */
.video-notice-box {
    display: flex;
    align-items: center;
    gap: 14px;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(52, 211, 153, 0.3);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    margin-bottom: 30px;
    font-size: 0.92rem;
    line-height: 1.6;
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 26px;
}

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

.video-card:hover {
    border-color: var(--border-highlight);
    transform: translateY(-5px);
    box-shadow: var(--card-shadow), var(--card-glow);
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    background: #000000;
}

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

.video-card-body {
    padding: 22px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.video-tag {
    display: inline-block;
    align-self: flex-start;
    background: rgba(16, 185, 129, 0.12);
    color: var(--primary-light);
    border: 1px solid rgba(16, 185, 129, 0.3);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.video-card-title {
    font-size: 1.12rem;
    font-weight: 800;
    margin-bottom: 10px;
    line-height: 1.5;
    color: var(--text-primary);
}

.video-card-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.video-tactical-tag {
    margin-top: auto;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-sm);
    border: 1px dashed var(--border-color);
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 16px;
}

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

.btn-yt {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #ef4444;
    background: rgba(239, 68, 68, 0.06);
    text-decoration: none;
    font-size: 0.86rem;
    font-weight: 700;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(239, 68, 68, 0.3);
    transition: all var(--transition-fast);
}

.btn-yt:hover {
    background: rgba(239, 68, 68, 0.15);
    border-color: #ef4444;
    transform: translateY(-2px);
}

/* ==========================================================================
   IFAB REFEREE LAB & WHISTLE SIMULATOR
   ========================================================================== */
.referee-lab-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 34px;
    box-shadow: var(--card-shadow);
}

.whistle-control-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 30px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.12) 0%, transparent 70%);
    border-radius: var(--radius-md);
    margin-bottom: 35px;
    border: 1px dashed rgba(16, 185, 129, 0.4);
}

.big-whistle-btn {
    width: 110px;
    height: 110px;
    border-radius: 50%;
    background: linear-gradient(135deg, #10b981, #047857);
    color: #ffffff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3.2rem;
    box-shadow: 0 8px 30px var(--primary-glow);
    transition: all var(--transition-fast);
    margin-bottom: 14px;
}

.big-whistle-btn:hover {
    transform: scale(1.08);
    box-shadow: 0 10px 40px rgba(16, 185, 129, 0.6);
}

.big-whistle-btn:active {
    transform: scale(0.95);
}

/* Scenario Cards */
.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
}

.scenario-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 22px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.scenario-question {
    font-size: 0.98rem;
    font-weight: 700;
}

.scenario-choices {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.choice-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 14px;
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 0.88rem;
    font-weight: 600;
    text-align: right;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.choice-btn:hover {
    border-color: var(--primary);
    background: var(--bg-card-hover);
}

.choice-btn.correct {
    background: rgba(16, 185, 129, 0.2);
    border-color: #10b981;
    color: #34d399;
}

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

.scenario-feedback {
    display: none;
    font-size: 0.85rem;
    padding: 10px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.05);
}

/* ==========================================================================
   3D FLIP CARDS
   ========================================================================== */
.flip-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.flip-card {
    height: 300px;
    perspective: 1000px;
    cursor: pointer;
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
}

.flip-card.flipped .flip-card-inner {
    transform: rotateY(180deg);
}

.flip-card-front, .flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: var(--radius-lg);
    padding: 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: var(--card-shadow);
}

.flip-card-front {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
}

.flip-card-back {
    background: linear-gradient(135deg, #064e3b, #032b1d);
    border: 1px solid var(--primary);
    transform: rotateY(180deg);
    color: #ffffff;
}

.flip-card-icon {
    font-size: 3.5rem;
    margin-bottom: 16px;
}

.flip-card-title {
    font-size: 1.3rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.flip-hint {
    font-size: 0.8rem;
    color: var(--primary-light);
    margin-top: 14px;
}

/* ==========================================================================
   TACTICAL MATCHING GAME
   ========================================================================== */
.matching-game-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 34px;
    box-shadow: var(--card-shadow);
}

.matching-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 24px;
}

.match-item {
    background: var(--bg-surface);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 700;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.match-item:hover {
    border-color: var(--primary);
    background: var(--bg-card-hover);
}

.match-item.selected {
    border-color: var(--secondary);
    background: rgba(56, 189, 248, 0.15);
}

.match-item.matched {
    border-color: var(--primary);
    background: rgba(16, 185, 129, 0.2);
    cursor: default;
    pointer-events: none;
}

/* ==========================================================================
   20-QUESTION QUIZ ENGINE
   ========================================================================== */
.quiz-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 34px;
    box-shadow: var(--card-shadow);
}

.quiz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.quiz-progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 30px;
}

.quiz-progress-fill {
    height: 100%;
    width: 5%;
    background: linear-gradient(90deg, var(--secondary), var(--primary));
    transition: width 0.3s ease;
}

.quiz-question-text {
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: 24px;
    line-height: 1.6;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 26px;
}

.quiz-option-btn {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 1rem;
    font-weight: 600;
    text-align: right;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 14px;
}

.quiz-option-btn:hover {
    border-color: var(--border-highlight);
    background: var(--bg-card-hover);
    transform: translateX(-4px);
}

.quiz-option-btn.correct {
    background: rgba(16, 185, 129, 0.25);
    border-color: #10b981;
    color: #34d399;
}

.quiz-option-btn.wrong {
    background: rgba(239, 68, 68, 0.25);
    border-color: #ef4444;
    color: #f87171;
}

.quiz-feedback-box {
    display: none;
    padding: 16px 20px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.04);
    border-right: 4px solid var(--primary);
    margin-bottom: 24px;
    font-size: 0.95rem;
    line-height: 1.7;
}

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

/* Quiz Final Score Result */
.quiz-result-view {
    display: none;
    text-align: center;
    padding: 40px 20px;
}

.result-badge {
    font-size: 4rem;
    margin-bottom: 16px;
}

.result-score-title {
    font-size: 2.2rem;
    font-weight: 900;
    margin-bottom: 10px;
}

/* ==========================================================================
   OFFICIAL STUDENT EVALUATION RUBRIC
   ========================================================================== */
.student-card-section {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--card-shadow);
}

.rubric-header-box {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 24px;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 28px;
}

.rubric-inputs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 28px;
}

.rubric-input-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.rubric-input-group input {
    width: 100%;
    padding: 10px 14px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--bg-surface);
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 0.92rem;
}

.rubric-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 30px;
}

.rubric-table th, .rubric-table td {
    padding: 14px 18px;
    border: 1px solid var(--border-color);
    text-align: center;
}

.rubric-table th {
    background: rgba(16, 185, 129, 0.15);
    color: var(--primary-light);
    font-weight: 800;
}

.rubric-signatures {
    display: flex;
    justify-content: space-around;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    margin-top: 30px;
    text-align: center;
}

.sig-box {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

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

.sig-name {
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--text-primary);
}

/* ==========================================================================
   PRESENTATION MODE OVERLAY (10 SLIDES)
   ========================================================================== */
.presentation-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: #050b14;
    z-index: 10000;
    flex-direction: column;
}

.presentation-overlay.active {
    display: flex;
}

.pres-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 30px;
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.pres-viewport {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.pres-slide {
    display: none;
    width: 100%;
    max-width: 1100px;
    animation: fadeIn 0.4s ease;
}

.pres-slide.active {
    display: block;
}

.slide-content-card {
    background: #0f1c2e;
    border: 1px solid rgba(16, 185, 129, 0.4);
    border-radius: var(--radius-lg);
    padding: 50px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.7);
}

.slide-badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: var(--radius-full);
    background: rgba(16, 185, 129, 0.15);
    color: #34d399;
    font-size: 0.9rem;
    font-weight: 800;
    margin-bottom: 20px;
}

.slide-title {
    font-size: 2.4rem;
    font-weight: 900;
    margin-bottom: 24px;
    line-height: 1.3;
}

.slide-points-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 18px;
    font-size: 1.2rem;
    line-height: 1.8;
}

.slide-points-list li {
    position: relative;
    padding-right: 32px;
}

.slide-points-list li::before {
    content: "⚽";
    position: absolute;
    right: 0;
    top: 2px;
}

.pres-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Footer */
.footer {
    background: #040913;
    border-top: 1px solid var(--border-color);
    padding: 60px 0 30px;
    margin-top: 80px;
}

.footer-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 30px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--border-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    color: var(--text-muted);
    font-size: 0.88rem;
}

/* ==========================================================================
   PITCH DIMENSIONS, SQUAD RULES, & FORMATIONS EXPLORER
   ========================================================================== */
.pitch-dim-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 30px;
    box-shadow: var(--card-shadow);
    margin-bottom: 35px;
}

.pitch-dim-graphic-box {
    background: linear-gradient(135deg, #032b1d 0%, #054e36 100%);
    border: 2px solid rgba(52, 211, 153, 0.3);
    border-radius: var(--radius-md);
    padding: 24px;
    margin-bottom: 25px;
    box-shadow: inset 0 0 35px rgba(0, 0, 0, 0.5);
}

.pitch-dim-svg {
    width: 100%;
    height: auto;
    max-height: 440px;
    display: block;
    filter: drop-shadow(0 8px 16px rgba(0,0,0,0.4));
}

.dim-specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 18px;
    margin-top: 20px;
}

.dim-spec-item {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 18px 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: all var(--transition-fast);
}

.dim-spec-item:hover {
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: var(--card-glow);
}

.dim-spec-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(16, 185, 129, 0.15);
    color: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    flex-shrink: 0;
}

.dim-spec-val {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--primary-light);
    line-height: 1.2;
}

.dim-spec-lbl {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 3px;
}

/* Squad & Substitution Rules Grid */
.squad-rules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 22px;
    margin-bottom: 40px;
}

.squad-rule-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--card-shadow);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.squad-rule-card:hover {
    border-color: var(--secondary);
    transform: translateY(-4px);
    box-shadow: var(--card-shadow), var(--secondary-glow);
}

.squad-rule-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.squad-rule-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 14px;
}

.squad-rule-badge {
    font-size: 0.78rem;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    background: rgba(56, 189, 248, 0.12);
    color: var(--secondary);
    border: 1px solid rgba(56, 189, 248, 0.3);
}

.squad-rule-title {
    font-size: 1.12rem;
    font-weight: 800;
    color: var(--text-primary);
}

.squad-rule-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 14px;
}

.squad-rule-points {
    list-style: none;
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.squad-rule-points li {
    position: relative;
    padding-right: 18px;
}

.squad-rule-points li::before {
    content: '✔';
    position: absolute;
    right: 0;
    color: var(--primary-light);
    font-weight: bold;
}

/* Formations Explorer */
.formations-explorer-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 30px;
    box-shadow: var(--card-shadow);
}

.formations-tabs-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.formation-tab-btn {
    padding: 10px 22px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

.formation-tab-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #ffffff;
    box-shadow: 0 4px 15px var(--primary-glow);
}

.formation-panel-body {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 30px;
    align-items: center;
}

.formation-pitch-box {
    background: linear-gradient(135deg, #032b1d 0%, #064e3b 100%);
    border: 2px solid rgba(52, 211, 153, 0.4);
    border-radius: var(--radius-md);
    padding: 15px;
    position: relative;
}

.formation-pitch-svg {
    width: 100%;
    height: auto;
    display: block;
}

.player-node {
    cursor: pointer;
    transition: transform 0.2s ease, filter 0.2s ease;
}

.player-node:hover {
    filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.85));
}

.player-node:hover circle {
    stroke-width: 3.5;
}

.formation-details-box {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.formation-header-badge {
    display: inline-block;
    align-self: flex-start;
    padding: 4px 14px;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 700;
    background: rgba(245, 158, 11, 0.15);
    color: var(--accent);
    border: 1px solid rgba(245, 158, 11, 0.35);
}

.formation-title {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-primary);
}

.formation-desc {
    font-size: 0.94rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.formation-tactical-block {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 14px 18px;
}

.formation-tactical-block h5 {
    font-size: 0.95rem;
    color: var(--primary-light);
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.formation-tactical-block p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Comprehensive Laws Encyclopedia Cards */
.laws-encyclopedia-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    margin-top: 25px;
}

.law-encyclopedia-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--card-shadow);
    transition: all var(--transition-normal);
}

.law-encyclopedia-card:hover {
    border-color: var(--border-highlight);
    transform: translateY(-4px);
    box-shadow: var(--card-shadow), var(--card-glow);
}

.law-card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.law-number-pill {
    padding: 3px 12px;
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    font-weight: 800;
    background: rgba(16, 185, 129, 0.15);
    color: var(--primary-light);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.law-category-tag {
    font-size: 0.78rem;
    color: var(--text-muted);
}

.law-card-heading {
    font-size: 1.15rem;
    font-weight: 800;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.law-card-summary {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 14px;
}

.law-card-bullets {
    list-style: none;
    font-size: 0.84rem;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-top: 12px;
    border-top: 1px dashed var(--border-color);
}

.law-card-bullets li {
    position: relative;
    padding-right: 18px;
    line-height: 1.5;
}

.law-card-bullets li::before {
    content: '•';
    position: absolute;
    right: 0;
    color: var(--accent);
    font-size: 1.2rem;
    line-height: 1;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive Media Queries */
@media (max-width: 992px) {
    .hero-title { font-size: 2.3rem; }
    .teacher-credential-box { grid-template-columns: 1fr; text-align: center; }
    .teacher-school-desc { justify-content: center; }
    .formation-panel-body { grid-template-columns: 1fr; }
    .matching-grid { grid-template-columns: 1fr; }
    .slide-title { font-size: 1.8rem; }
    .slide-points-list { font-size: 1.05rem; }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero-title { font-size: 1.9rem; }
    .tactics-control-bar { flex-direction: column; align-items: stretch; }
    .tactic-mode-pills { justify-content: center; }
    .pitch-action-btns { justify-content: center; }
    .slide-content-card { padding: 30px 20px; }
    .pitch-dim-wrapper { padding: 20px; }
}