/* ========================================
   CX B2B/B2G Excellence Training - Main Styles
   ======================================== */

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #06b6d4;
    --accent: #f59e0b;
    --danger: #ef4444;
    --success: #10b981;
    --dark: #0f172a;
    --dark-2: #1e293b;
    --dark-3: #334155;
    --gray: #64748b;
    --gray-light: #94a3b8;
    --light: #f1f5f9;
    --light-2: #e2e8f0;
    --white: #ffffff;
    --gradient-1: linear-gradient(135deg, #6366f1, #06b6d4);
    --gradient-2: linear-gradient(135deg, #f59e0b, #ef4444);
    --gradient-3: linear-gradient(135deg, #10b981, #06b6d4);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Tajawal', 'Cairo', sans-serif;
    background: var(--dark);
    color: var(--light);
    line-height: 1.7;
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   Splash Screen
   ======================================== */
.splash-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--dark);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

.splash-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

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

.splash-icon {
    font-size: 4rem;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
    animation: pulse 1.5s infinite;
}

.splash-content h1 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 8px;
    color: var(--white);
}

.splash-content h2 {
    font-size: 1.2rem;
    font-weight: 400;
    color: var(--primary-light);
    margin-bottom: 30px;
}

.splash-loader {
    width: 200px;
    height: 4px;
    background: var(--dark-3);
    border-radius: 4px;
    margin: 0 auto 16px;
    overflow: hidden;
}

.loader-bar {
    height: 100%;
    width: 0%;
    background: var(--gradient-1);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.splash-text {
    color: var(--gray);
    font-size: 0.9rem;
    transition: opacity 0.3s;
}

/* ========================================
   Navigation
   ======================================== */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(99, 102, 241, 0.1);
    transition: var(--transition);
    transform: translateY(-100%);
}

.main-nav.visible {
    transform: translateY(0);
}

.main-nav.scrolled {
    background: rgba(15, 23, 42, 0.95);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--white);
}

.nav-brand i {
    color: var(--primary);
    font-size: 1.4rem;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 4px;
}

.nav-links a {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    color: var(--gray-light);
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--white);
    background: rgba(99, 102, 241, 0.15);
}

.nav-links a.active {
    color: var(--primary-light);
}

.nav-links a i {
    font-size: 0.8rem;
}

.nav-progress {
    display: flex;
    align-items: center;
}

.progress-ring {
    position: relative;
    width: 40px;
    height: 40px;
}

.progress-ring svg {
    transform: rotate(-90deg);
    width: 40px;
    height: 40px;
}

.progress-bg {
    fill: none;
    stroke: var(--dark-3);
    stroke-width: 3;
}

.progress-fill {
    fill: none;
    stroke: var(--primary);
    stroke-width: 3;
    stroke-linecap: round;
    transition: stroke-dasharray 0.5s ease;
}

.progress-ring span {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.6rem;
    font-weight: 700;
    color: var(--primary-light);
}

/* ========================================
   Hero Section
   ======================================== */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 100px 24px;
    overflow: hidden;
    background: radial-gradient(ellipse at 50% 0%, rgba(99,102,241,0.15) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 80%, rgba(6,182,212,0.1) 0%, transparent 50%),
                var(--dark);
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
}

.hero-badge {
    display: inline-block;
    padding: 6px 20px;
    border-radius: 50px;
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: var(--primary-light);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 24px;
}

.hero-title {
    font-size: 3.2rem;
    font-weight: 900;
    line-height: 1.3;
    margin-bottom: 20px;
    color: var(--white);
}

.gradient-text {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray-light);
    margin-bottom: 48px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 900;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--gray);
    margin-top: 4px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: var(--gradient-1);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--primary-light);
    border: 2px solid rgba(99, 102, 241, 0.4);
}

.btn-outline:hover {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--primary);
    transform: translateY(-2px);
}

.hero-scroll {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounceDown 2s infinite;
}

.hero-scroll a {
    color: var(--gray);
    font-size: 1.5rem;
    text-decoration: none;
}

@keyframes bounceDown {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(10px); }
    60% { transform: translateX(-50%) translateY(5px); }
}

/* ========================================
   Sections Common
   ======================================== */
.section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 4px 16px;
    border-radius: 50px;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    color: var(--primary-light);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 12px;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--gray);
    max-width: 650px;
    margin: 0 auto;
}

/* ========================================
   Overview Section
   ======================================== */
.overview-section {
    background: linear-gradient(180deg, var(--dark) 0%, var(--dark-2) 100%);
}

.philosophy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 60px;
}

.philosophy-card {
    background: rgba(30, 41, 59, 0.6);
    border: 1px solid rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.philosophy-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-1);
    opacity: 0;
    transition: var(--transition);
}

.philosophy-card:hover {
    transform: translateY(-5px);
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.philosophy-card:hover::before {
    opacity: 1;
}

.card-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: var(--gradient-1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: var(--white);
    margin-bottom: 20px;
}

.philosophy-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 12px;
}

.philosophy-card p {
    color: var(--gray-light);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* Audience Section */
.audience-section {
    margin-top: 40px;
}

.audience-section h3 {
    text-align: center;
    font-size: 1.5rem;
    color: var(--white);
    margin-bottom: 32px;
}

.audience-section h3 i {
    color: var(--accent);
    margin-left: 8px;
}

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

.audience-card {
    background: rgba(30, 41, 59, 0.6);
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid rgba(99, 102, 241, 0.1);
    transition: var(--transition);
}

.audience-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.2);
}

.audience-card.b2b { border-top: 3px solid var(--primary); }
.audience-card.b2g { border-top: 3px solid var(--secondary); }

.audience-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    margin-bottom: 16px;
}

.b2b .audience-icon { background: rgba(99, 102, 241, 0.15); color: var(--primary-light); }
.b2g .audience-icon { background: rgba(6, 182, 212, 0.15); color: var(--secondary); }

.audience-card h4 {
    font-size: 1.2rem;
    color: var(--white);
    margin-bottom: 8px;
}

.audience-card p {
    color: var(--gray);
    margin-bottom: 16px;
    font-size: 0.95rem;
}

.audience-card ul {
    list-style: none;
    padding: 0;
}

.audience-card ul li {
    padding: 6px 0;
    color: var(--gray-light);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.audience-card ul li::before {
    content: '✦';
    color: var(--primary-light);
    font-size: 0.7rem;
}

.b2g ul li::before { color: var(--secondary); }

/* ========================================
   Units Section
   ======================================== */
.units-section {
    background: var(--dark);
}

.units-timeline {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.unit-card {
    display: flex;
    gap: 24px;
    background: rgba(30, 41, 59, 0.5);
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid rgba(99, 102, 241, 0.08);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.unit-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 4px;
    transition: var(--transition);
}

.unit-card[data-phase="foundation"]::before { background: var(--primary); }
.unit-card[data-phase="intermediate"]::before { background: var(--secondary); }
.unit-card[data-phase="advanced"]::before { background: var(--accent); }
.unit-card[data-phase="mastery"]::before { background: var(--danger); }

.unit-card:hover {
    transform: translateX(-5px);
    border-color: rgba(99, 102, 241, 0.2);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.unit-number {
    font-size: 3rem;
    font-weight: 900;
    min-width: 80px;
    text-align: center;
    line-height: 1;
    padding-top: 8px;
}

.unit-card[data-phase="foundation"] .unit-number { color: var(--primary); }
.unit-card[data-phase="intermediate"] .unit-number { color: var(--secondary); }
.unit-card[data-phase="advanced"] .unit-number { color: var(--accent); }
.unit-card[data-phase="mastery"] .unit-number { color: var(--danger); }

.unit-content {
    flex: 1;
}

.unit-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.unit-phase {
    font-size: 0.8rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 50px;
}

.unit-card[data-phase="foundation"] .unit-phase { background: rgba(99,102,241,0.15); color: var(--primary-light); }
.unit-card[data-phase="intermediate"] .unit-phase { background: rgba(6,182,212,0.15); color: var(--secondary); }
.unit-card[data-phase="advanced"] .unit-phase { background: rgba(245,158,11,0.15); color: var(--accent); }
.unit-card[data-phase="mastery"] .unit-phase { background: rgba(239,68,68,0.15); color: var(--danger); }

.unit-hours {
    font-size: 0.85rem;
    color: var(--gray);
}

.unit-hours i { margin-left: 4px; }

.unit-content h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 8px;
}

.unit-content > p {
    color: var(--gray-light);
    font-size: 0.95rem;
    margin-bottom: 16px;
}

.unit-topics {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.topic-tag {
    padding: 4px 12px;
    border-radius: 50px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.8rem;
    color: var(--gray-light);
    transition: var(--transition);
}

.topic-tag:hover {
    background: rgba(99, 102, 241, 0.1);
    border-color: rgba(99, 102, 241, 0.3);
    color: var(--primary-light);
}

.unit-expand-btn {
    background: none;
    border: none;
    color: var(--primary-light);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 0;
    transition: var(--transition);
}

.unit-expand-btn:hover {
    color: var(--white);
}

.unit-expand-btn i {
    transition: var(--transition);
}

.unit-expand-btn.active i {
    transform: rotate(45deg);
}

.unit-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 4px;
}

.unit-detail-link {
    color: var(--secondary);
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(6, 182, 212, 0.25);
    transition: var(--transition);
    background: rgba(6, 182, 212, 0.05);
}

.unit-detail-link:hover {
    background: rgba(6, 182, 212, 0.15);
    color: var(--white);
    border-color: var(--secondary);
}

.unit-detail {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.unit-detail.open {
    max-height: 800px;
}

.detail-section {
    margin-top: 20px;
    padding: 20px;
    background: rgba(15, 23, 42, 0.5);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.detail-section + .detail-section {
    margin-top: 12px;
}

.detail-section h4 {
    font-size: 1rem;
    color: var(--primary-light);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.detail-section ul {
    list-style: none;
    padding: 0;
}

.detail-section ul li {
    padding: 6px 0;
    color: var(--gray-light);
    font-size: 0.9rem;
    padding-right: 20px;
    position: relative;
}

.detail-section ul li::before {
    content: '→';
    position: absolute;
    right: 0;
    color: var(--primary);
}

.detail-section p {
    color: var(--gray-light);
    font-size: 0.9rem;
    padding: 12px;
    background: rgba(99, 102, 241, 0.05);
    border-radius: var(--radius-sm);
    border-right: 3px solid var(--primary);
}

/* ========================================
   Assessment Section
   ======================================== */
.assessment-section {
    background: linear-gradient(180deg, var(--dark-2) 0%, var(--dark) 100%);
}

.assessment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 60px;
}

.cert-card {
    background: rgba(30, 41, 59, 0.6);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    border: 1px solid rgba(99, 102, 241, 0.1);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.cert-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.cert-card[data-level="1"] { border-top: 3px solid var(--primary); }
.cert-card[data-level="2"] { border-top: 3px solid var(--secondary); }
.cert-card[data-level="3"] { border-top: 3px solid var(--accent); }
.cert-card[data-level="4"] { border-top: 3px solid var(--danger); }

.cert-badge {
    font-size: 3rem;
    margin-bottom: 16px;
}

.cert-card[data-level="1"] .cert-badge { color: var(--primary); }
.cert-card[data-level="2"] .cert-badge { color: var(--secondary); }
.cert-card[data-level="3"] .cert-badge { color: var(--accent); }
.cert-card[data-level="4"] .cert-badge { color: var(--danger); }

.cert-level {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.cert-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 20px;
}

.cert-details {
    margin-bottom: 20px;
}

.cert-details p {
    color: var(--gray-light);
    font-size: 0.9rem;
    padding: 4px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.cert-details i {
    color: var(--primary-light);
    width: 20px;
}

.cert-requirements {
    text-align: right;
    padding-top: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.cert-requirements h4 {
    font-size: 0.9rem;
    color: var(--gray);
    margin-bottom: 8px;
}

.cert-requirements ul {
    list-style: none;
    padding: 0;
}

.cert-requirements li {
    font-size: 0.85rem;
    color: var(--gray-light);
    padding: 4px 0;
    padding-right: 16px;
    position: relative;
}

.cert-requirements li::before {
    content: '✓';
    position: absolute;
    right: 0;
    color: var(--success);
    font-weight: 700;
}

/* Assessment Methods */
.assessment-methods {
    background: rgba(30, 41, 59, 0.4);
    border-radius: var(--radius-lg);
    padding: 40px;
    border: 1px solid rgba(99, 102, 241, 0.1);
}

.assessment-methods h3 {
    text-align: center;
    font-size: 1.5rem;
    color: var(--white);
    margin-bottom: 32px;
}

.assessment-methods h3 i {
    color: var(--accent);
    margin-left: 8px;
}

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

.method-item {
    text-align: center;
    padding: 24px;
    background: rgba(15, 23, 42, 0.5);
    border-radius: var(--radius-md);
    position: relative;
    transition: var(--transition);
}

.method-item:hover {
    transform: translateY(-3px);
    background: rgba(15, 23, 42, 0.8);
}

.method-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 1.2rem;
    color: var(--white);
}

.method-item h4 {
    color: var(--white);
    margin-bottom: 8px;
    font-size: 1rem;
}

.method-item p {
    color: var(--gray);
    font-size: 0.85rem;
    margin-bottom: 12px;
}

.method-weight {
    display: inline-block;
    padding: 4px 16px;
    border-radius: 50px;
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-light);
    font-size: 1.1rem;
    font-weight: 700;
}

/* ========================================
   Tools Section
   ======================================== */
.tools-section {
    background: var(--dark);
}

.tools-categories {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tool-filter {
    padding: 8px 20px;
    border-radius: 50px;
    background: rgba(30, 41, 59, 0.6);
    border: 1px solid rgba(99, 102, 241, 0.1);
    color: var(--gray-light);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.tool-filter:hover,
.tool-filter.active {
    background: rgba(99, 102, 241, 0.15);
    border-color: rgba(99, 102, 241, 0.3);
    color: var(--primary-light);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.tool-card {
    background: rgba(30, 41, 59, 0.5);
    border-radius: var(--radius-md);
    padding: 24px;
    border: 1px solid rgba(99, 102, 241, 0.08);
    transition: var(--transition);
    position: relative;
}

.tool-card:hover {
    transform: translateY(-3px);
    border-color: rgba(99, 102, 241, 0.2);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.tool-card.hidden {
    display: none;
}

.tool-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background: var(--gradient-1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: var(--white);
    margin-bottom: 16px;
}

.tool-card h4 {
    font-size: 1rem;
    color: var(--white);
    margin-bottom: 8px;
}

.tool-card p {
    color: var(--gray);
    font-size: 0.85rem;
    margin-bottom: 12px;
    line-height: 1.6;
}

.tool-unit {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 50px;
    background: rgba(6, 182, 212, 0.1);
    color: var(--secondary);
    font-size: 0.75rem;
    font-weight: 600;
}

/* ========================================
   Quiz Section
   ======================================== */
.quiz-section {
    background: linear-gradient(180deg, var(--dark) 0%, var(--dark-2) 100%);
}

.quiz-container {
    max-width: 800px;
    margin: 0 auto;
    background: rgba(30, 41, 59, 0.6);
    border-radius: var(--radius-lg);
    padding: 40px;
    border: 1px solid rgba(99, 102, 241, 0.1);
}

.quiz-header {
    margin-bottom: 32px;
}

.quiz-progress-bar {
    height: 6px;
    background: var(--dark-3);
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 16px;
}

.quiz-progress-fill {
    height: 100%;
    background: var(--gradient-1);
    border-radius: 6px;
    transition: width 0.5s ease;
    width: 10%;
}

.quiz-info {
    display: flex;
    justify-content: space-between;
    color: var(--gray);
    font-size: 0.9rem;
}

.quiz-body {
    min-height: 300px;
}

.quiz-question {
    margin-bottom: 24px;
}

.quiz-question h3 {
    font-size: 1.2rem;
    color: var(--white);
    margin-bottom: 24px;
    line-height: 1.6;
}

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

.quiz-option {
    padding: 16px 20px;
    border-radius: var(--radius-md);
    background: rgba(15, 23, 42, 0.5);
    border: 2px solid rgba(255, 255, 255, 0.08);
    color: var(--light);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 12px;
}

.quiz-option:hover {
    border-color: rgba(99, 102, 241, 0.4);
    background: rgba(99, 102, 241, 0.08);
}

.quiz-option.selected {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.15);
}

.quiz-option.correct {
    border-color: var(--success);
    background: rgba(16, 185, 129, 0.15);
}

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

.option-letter {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
    flex-shrink: 0;
}

.quiz-option.selected .option-letter {
    background: var(--primary);
    color: var(--white);
}

.quiz-option.correct .option-letter {
    background: var(--success);
    color: var(--white);
}

.quiz-option.wrong .option-letter {
    background: var(--danger);
    color: var(--white);
}

.quiz-explanation {
    margin-top: 16px;
    padding: 16px;
    border-radius: var(--radius-sm);
    background: rgba(99, 102, 241, 0.08);
    border-right: 3px solid var(--primary);
    color: var(--gray-light);
    font-size: 0.9rem;
    display: none;
}

.quiz-explanation.show {
    display: block;
}

.quiz-footer {
    display: flex;
    justify-content: space-between;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Quiz Results */
.quiz-results {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
    background: rgba(30, 41, 59, 0.6);
    border-radius: var(--radius-lg);
    padding: 48px;
    border: 1px solid rgba(99, 102, 241, 0.1);
}

.results-icon {
    font-size: 4rem;
    margin-bottom: 20px;
}

.quiz-results h3 {
    font-size: 1.8rem;
    color: var(--white);
    margin-bottom: 12px;
}

.quiz-results > p {
    color: var(--gray);
    margin-bottom: 24px;
}

.results-score {
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: 32px;
}

.results-breakdown {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 32px;
}

.breakdown-item {
    padding: 16px;
    border-radius: var(--radius-md);
    background: rgba(15, 23, 42, 0.5);
}

.breakdown-item .num {
    font-size: 1.5rem;
    font-weight: 800;
    display: block;
}

.breakdown-item .label {
    font-size: 0.8rem;
    color: var(--gray);
}

/* ========================================
   Footer
   ======================================== */
.main-footer {
    background: var(--dark-2);
    padding: 60px 0 0;
    border-top: 1px solid rgba(99, 102, 241, 0.1);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
}

.footer-brand h3 {
    font-size: 1.3rem;
    color: var(--white);
    margin-bottom: 12px;
}

.footer-brand h3 i {
    color: var(--primary);
}

.footer-brand p {
    color: var(--gray);
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.footer-links h4,
.footer-contact h4 {
    color: var(--white);
    margin-bottom: 16px;
    font-size: 1rem;
}

.footer-links a {
    display: block;
    color: var(--gray);
    text-decoration: none;
    padding: 4px 0;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-light);
    padding-right: 8px;
}

.footer-contact p {
    color: var(--gray);
    font-size: 0.85rem;
    margin-bottom: 4px;
}

.footer-bottom {
    padding: 20px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
}

.footer-bottom p {
    color: var(--dark-3);
    font-size: 0.85rem;
}

/* ========================================
   Back to Top
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    left: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-1);
    border: none;
    color: var(--white);
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
    z-index: 100;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 1024px) {
    .hero-title { font-size: 2.5rem; }
    .section-header h2 { font-size: 2rem; }
    .footer-content { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: 64px;
        right: -100%;
        width: 280px;
        height: calc(100vh - 64px);
        background: var(--dark-2);
        flex-direction: column;
        padding: 24px;
        gap: 4px;
        transition: var(--transition);
        border-left: 1px solid rgba(99, 102, 241, 0.1);
        overflow-y: auto;
    }
    
    .nav-links.open {
        right: 0;
    }
    
    .nav-progress {
        display: none;
    }
    
    .hero-title { font-size: 2rem; }
    .hero-subtitle { font-size: 1rem; }
    .hero-stats { gap: 24px; }
    .stat-number { font-size: 2rem; }
    
    .unit-card {
        flex-direction: column;
        gap: 16px;
    }
    
    .unit-number {
        font-size: 2rem;
        text-align: right;
    }
    
    .section { padding: 60px 0; }
    .section-header h2 { font-size: 1.6rem; }
    
    .results-breakdown {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title { font-size: 1.6rem; }
    .hero-stats { gap: 16px; }
    .stat-number { font-size: 1.8rem; }
    .hero-cta { flex-direction: column; align-items: center; }
    .btn { width: 100%; justify-content: center; }
    
    .quiz-container { padding: 20px; }
    .quiz-results { padding: 24px; }
}

/* ========================================
   Light Theme Overrides
   ======================================== */
body.light-theme {
    --dark: #f8fafc;
    --dark-2: #f1f5f9;
    --dark-3: #e2e8f0;
    --white: #0f172a;
    --light: #1e293b;
    --light-2: #334155;
    --gray: #64748b;
    --gray-light: #94a3b8;
    background: #f8fafc;
    color: #1e293b;
}

body.light-theme .main-nav {
    background: rgba(248, 250, 252, 0.92);
    border-bottom: 1px solid rgba(99, 102, 241, 0.12);
    backdrop-filter: blur(12px);
}

body.light-theme .main-nav.scrolled {
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

body.light-theme .nav-brand span,
body.light-theme .nav-links a {
    color: #334155;
}

body.light-theme .nav-links a:hover,
body.light-theme .nav-links a.active {
    color: #6366f1;
}

body.light-theme .hero-section {
    background: radial-gradient(ellipse at 50% 0%, rgba(99,102,241,0.06) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 80%, rgba(6,182,212,0.04) 0%, transparent 50%),
                #f8fafc;
}

body.light-theme .hero-title,
body.light-theme .section-header h2 {
    color: #0f172a;
}

body.light-theme .hero-subtitle,
body.light-theme .section-header p {
    color: #64748b;
}

body.light-theme .hero-stats .stat-label {
    color: #64748b;
}

body.light-theme .philosophy-card,
body.light-theme .audience-card,
body.light-theme .unit-card,
body.light-theme .tool-card,
body.light-theme .cert-card {
    background: rgba(255, 255, 255, 0.85);
    border-color: rgba(99, 102, 241, 0.1);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

body.light-theme .philosophy-card:hover,
body.light-theme .audience-card:hover,
body.light-theme .unit-card:hover,
body.light-theme .tool-card:hover,
body.light-theme .cert-card:hover {
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.1);
    border-color: rgba(99, 102, 241, 0.2);
}

body.light-theme .philosophy-card h3,
body.light-theme .audience-card h4,
body.light-theme .unit-card h3,
body.light-theme .tool-card h4,
body.light-theme .cert-card h3 {
    color: #0f172a;
}

body.light-theme .philosophy-card p,
body.light-theme .audience-card p,
body.light-theme .unit-card p,
body.light-theme .tool-card p {
    color: #475569;
}

body.light-theme .unit-detail {
    background: rgba(241, 245, 249, 0.8);
    border-color: rgba(99, 102, 241, 0.1);
}

body.light-theme .unit-phase {
    color: #6366f1;
}

body.light-theme .topic-tag {
    background: rgba(99, 102, 241, 0.08);
    color: #4f46e5;
    border-color: rgba(99, 102, 241, 0.15);
}

body.light-theme .section-tag {
    color: #6366f1;
}

body.light-theme .quiz-container,
body.light-theme .quiz-results {
    background: rgba(255, 255, 255, 0.85);
    border-color: rgba(99, 102, 241, 0.1);
}

body.light-theme .quiz-option {
    background: rgba(241, 245, 249, 0.8);
    border-color: rgba(99, 102, 241, 0.1);
    color: #1e293b;
}

body.light-theme .quiz-option:hover {
    border-color: rgba(99, 102, 241, 0.3);
}

body.light-theme .overview-section,
body.light-theme .units-section,
body.light-theme .tools-section,
body.light-theme .quiz-section {
    background: #f8fafc;
}

body.light-theme .section {
    background: #f8fafc;
}

body.light-theme .section[style*="background:linear-gradient"] {
    background: linear-gradient(180deg, #f1f5f9 0%, #f8fafc 100%) !important;
}

body.light-theme .info-box {
    background: rgba(255, 255, 255, 0.85);
    border-color: rgba(99, 102, 241, 0.1);
}

body.light-theme .main-footer {
    background: #1e293b;
    color: #e2e8f0;
}

body.light-theme .main-footer a {
    color: #94a3b8;
}

body.light-theme .main-footer a:hover {
    color: #818cf8;
}

body.light-theme .back-to-top {
    background: #6366f1;
    color: white;
}

body.light-theme .btn-outline {
    border-color: rgba(99, 102, 241, 0.3);
    color: #6366f1;
}

body.light-theme .btn-outline:hover {
    background: rgba(99, 102, 241, 0.08);
}

body.light-theme .splash-screen {
    background: #f8fafc;
    color: #0f172a;
}

@media (max-width: 768px) {
    body.light-theme .nav-links {
        background: rgba(248, 250, 252, 0.98);
        border-left-color: rgba(99, 102, 241, 0.1);
    }
}