/* Root Variables */
:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --success-gradient: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    --warning-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);

    --bg-primary: #0a0e27;
    --bg-secondary: #121736;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);

    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --text-muted: #718096;

    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Company Header */
.company-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 0;
}

.company-brand {
    display: flex;
    align-items: center;
    gap: 16px;
}

.company-logo {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.company-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.company-name {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.company-tagline {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 400;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px 20px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    background: radial-gradient(ellipse at top, rgba(102, 126, 234, 0.15) 0%, transparent 60%),
                radial-gradient(ellipse at bottom, rgba(118, 75, 162, 0.15) 0%, transparent 60%);
}

.neural-network {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image:
        repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(102, 126, 234, 0.03) 2px, rgba(102, 126, 234, 0.03) 4px),
        repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(102, 126, 234, 0.03) 2px, rgba(102, 126, 234, 0.03) 4px);
    animation: networkPulse 20s ease-in-out infinite;
}

@keyframes networkPulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.6; }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
}

.badge {
    display: inline-block;
    padding: 8px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: 4.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.gradient-text {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 8s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { filter: hue-rotate(0deg); }
    50% { filter: hue-rotate(20deg); }
}

.subtitle {
    font-size: 2rem;
    font-weight: 400;
    color: var(--text-secondary);
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 48px;
    line-height: 1.8;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 60px;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Section Styles */
section {
    padding: 100px 20px;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 16px;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* Program Cards */
.program-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.program-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.program-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.program-card.active::before {
    transform: scaleX(1);
}

.program-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(102, 126, 234, 0.3);
}

.program-status {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 20px;
}

.program-status.available {
    background: var(--success-gradient);
    color: var(--bg-primary);
}

.program-status.coming-soon {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
}

.program-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: block;
}

.program-card h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
    font-weight: 600;
}

.program-card p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.program-meta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.program-meta span {
    padding: 6px 14px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Course Section */
.course-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: 80px 60px;
    margin: 60px 0;
    border: 1px solid var(--border-color);
}

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

.course-badge {
    display: inline-block;
    padding: 10px 24px;
    background: var(--success-gradient);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 20px;
    color: var(--bg-primary);
}

.course-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.course-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* Tabs */
.tabs-container {
    margin-top: 40px;
}

.tabs-nav {
    display: flex;
    gap: 12px;
    margin-bottom: 40px;
    background: var(--bg-card);
    padding: 8px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.tab-btn {
    flex: 1;
    padding: 16px 24px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
    font-family: inherit;
}

.tab-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--primary-gradient);
    color: var(--text-primary);
    font-weight: 600;
}

.tab-content {
    display: none;
    animation: fadeIn 0.4s ease;
}

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

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

/* Day Header */
.day-header {
    text-align: center;
    margin-bottom: 60px;
}

.day-header h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.day-tagline {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* Timeline */
.timeline {
    position: relative;
    padding: 40px 0;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: linear-gradient(to bottom,
        rgba(102, 126, 234, 0.1),
        rgba(102, 126, 234, 0.5),
        rgba(102, 126, 234, 0.1)
    );
}

.timeline-item {
    position: relative;
    margin: 40px 0;
    padding-left: calc(50% + 40px);
}

.timeline-item:nth-child(even) {
    padding-left: 0;
    padding-right: calc(50% + 40px);
    text-align: right;
}

.timeline-marker {
    position: absolute;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    background: var(--primary-gradient);
    border-radius: 50%;
    border: 3px solid var(--bg-secondary);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.2);
    z-index: 2;
    animation: pulse 2s ease-in-out infinite;
}

.timeline-item.highlight .timeline-marker {
    width: 28px;
    height: 28px;
    background: var(--accent-gradient);
    box-shadow: 0 0 0 6px rgba(79, 172, 254, 0.3);
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.2); }
    50% { box-shadow: 0 0 0 8px rgba(102, 126, 234, 0.1); }
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
}

.timeline-content:hover {
    background: var(--bg-card-hover);
    border-color: rgba(102, 126, 234, 0.3);
    transform: scale(1.02);
}

.timeline-content h4 {
    font-size: 1.25rem;
    margin-bottom: 8px;
    font-weight: 600;
}

.timeline-content p {
    color: var(--text-secondary);
    font-size: 0.938rem;
    margin-bottom: 12px;
}

.timeline-tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(102, 126, 234, 0.2);
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    color: #b4c6ff;
}

/* Topics Grid */
.topics-grid {
    margin-top: 60px;
}

.topics-heading {
    font-size: 1.5rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 32px;
}

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

.topic {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 32px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.topic::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.topic:hover::before {
    transform: scaleX(1);
}

.topic:hover {
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    border-color: rgba(102, 126, 234, 0.3);
}

.topic-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 16px;
}

.topic h5 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.topic p {
    color: var(--text-secondary);
    font-size: 0.938rem;
}

/* Homework Section */
.homework-section {
    margin-top: 60px;
    background: linear-gradient(135deg, rgba(67, 233, 123, 0.1) 0%, rgba(56, 249, 215, 0.1) 100%);
    border: 1px solid rgba(67, 233, 123, 0.3);
    border-radius: var(--radius-lg);
    padding: 32px 40px;
    display: flex;
    align-items: center;
    gap: 24px;
}

.homework-icon {
    font-size: 3rem;
    flex-shrink: 0;
}

.homework-content h4 {
    font-size: 1.25rem;
    margin-bottom: 8px;
    font-weight: 600;
}

.homework-content p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Day Navigation */
.day-navigation {
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    gap: 20px;
}

.nav-btn {
    flex: 1;
    padding: 20px 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
    font-family: inherit;
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-btn:hover {
    background: var(--bg-card-hover);
    border-color: rgba(102, 126, 234, 0.5);
    transform: translateY(-2px);
}

.prev-btn {
    justify-content: flex-start;
}

.next-btn {
    justify-content: flex-end;
}

.nav-arrow {
    font-size: 1.25rem;
    font-weight: 700;
    transition: transform var(--transition-base);
}

.nav-btn:hover .nav-arrow {
    transform: translateX(4px);
}

.prev-btn:hover .nav-arrow {
    transform: translateX(-4px);
}

/* Comparison Section (Day 2) */
.comparison-section {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 32px;
    align-items: center;
    margin-bottom: 60px;
}

.comparison-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    transition: all var(--transition-base);
}

.comparison-card.highlight {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border-color: rgba(102, 126, 234, 0.3);
}

.comparison-card h4 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.comparison-list {
    list-style: none;
    margin-bottom: 24px;
}

.comparison-list li {
    padding: 10px 0;
    padding-left: 28px;
    position: relative;
    color: var(--text-secondary);
}

.comparison-list li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: 600;
}

.comparison-divider {
    font-size: 3rem;
    color: var(--text-secondary);
    text-align: center;
}

.comparison-examples {
    background: rgba(255, 255, 255, 0.03);
    padding: 20px;
    border-radius: var(--radius-sm);
}

.comparison-examples h5 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.comparison-examples p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Insight Boxes */
.insight-boxes {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    margin-bottom: 60px;
}

.insight-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.insight-box.success {
    background: linear-gradient(135deg, rgba(67, 233, 123, 0.1) 0%, rgba(56, 249, 215, 0.1) 100%);
    border-color: rgba(67, 233, 123, 0.3);
}

.insight-box.warning {
    background: linear-gradient(135deg, rgba(250, 112, 154, 0.1) 0%, rgba(254, 225, 64, 0.1) 100%);
    border-color: rgba(250, 112, 154, 0.3);
}

.insight-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.insight-box h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.insight-box ul {
    list-style: none;
}

.insight-box li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    color: var(--text-secondary);
}

.insight-box.success li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #43e97b;
}

.insight-box.warning li::before {
    content: "!";
    position: absolute;
    left: 0;
    color: #fa709a;
}

/* Model Cards (Day 3) */
.model-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    margin-bottom: 60px;
}

.model-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all var(--transition-base);
}

.model-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    border-color: rgba(102, 126, 234, 0.3);
}

.model-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.model-card h4 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.model-description {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.model-examples {
    background: rgba(255, 255, 255, 0.03);
    padding: 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 0.938rem;
}

.model-strengths, .model-limitations {
    margin-bottom: 20px;
}

.model-card h5 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.model-card ul {
    list-style: none;
}

.model-card li {
    padding: 6px 0;
    padding-left: 20px;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.938rem;
}

.model-card li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: #667eea;
}

/* Prompting Intro */
.prompting-intro {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border: 1px solid rgba(102, 126, 234, 0.3);
    border-radius: var(--radius-lg);
    padding: 40px;
    margin-top: 60px;
}

.prompting-intro h4 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 32px;
    text-align: center;
}

.prompting-explanation {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
}

.prompting-point {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

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

.prompting-point h5 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.prompting-point p {
    color: var(--text-secondary);
    font-size: 0.938rem;
}

/* Framework Section (Day 4) */
.framework-section {
    margin-bottom: 60px;
}

.framework-section h4 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 12px;
    text-align: center;
}

.framework-intro {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.framework-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    margin-bottom: 40px;
}

.framework-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all var(--transition-base);
}

.framework-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    border-color: rgba(102, 126, 234, 0.3);
}

.framework-letter {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.framework-card h5 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.framework-card > p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.framework-examples {
    background: rgba(255, 255, 255, 0.03);
    padding: 20px;
    border-radius: var(--radius-sm);
}

.framework-examples strong {
    display: block;
    margin-bottom: 12px;
    font-size: 0.938rem;
}

.framework-examples ul {
    list-style: none;
}

.framework-examples li {
    padding: 6px 0;
    padding-left: 20px;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.framework-examples li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: #667eea;
}

/* Prompt Comparison */
.prompt-comparison {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 24px;
    align-items: center;
}

.prompt-example {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
}

.prompt-example.weak {
    border-color: rgba(250, 112, 154, 0.3);
}

.prompt-example.strong {
    border-color: rgba(67, 233, 123, 0.3);
    background: linear-gradient(135deg, rgba(67, 233, 123, 0.05) 0%, rgba(56, 249, 215, 0.05) 100%);
}

.prompt-label {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 12px;
    display: block;
}

.prompt-example p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
}

.prompt-arrow {
    font-size: 2rem;
    color: var(--text-secondary);
    text-align: center;
}

/* Safety Section */
.safety-section {
    margin-top: 60px;
}

.safety-section h4 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 40px;
    text-align: center;
}

.safety-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.safety-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 28px;
}

.safety-card.warning {
    background: linear-gradient(135deg, rgba(250, 112, 154, 0.1) 0%, rgba(254, 225, 64, 0.1) 100%);
    border-color: rgba(250, 112, 154, 0.3);
}

.safety-card.danger {
    background: linear-gradient(135deg, rgba(245, 87, 108, 0.1) 0%, rgba(240, 147, 251, 0.1) 100%);
    border-color: rgba(245, 87, 108, 0.3);
}

.safety-card.success {
    background: linear-gradient(135deg, rgba(67, 233, 123, 0.1) 0%, rgba(56, 249, 215, 0.1) 100%);
    border-color: rgba(67, 233, 123, 0.3);
}

.safety-card h5 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.safety-card ul {
    list-style: none;
}

.safety-card li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.938rem;
}

.safety-card li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: #667eea;
}

.safety-tips {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.safety-tips strong {
    display: block;
    margin-bottom: 8px;
    font-size: 0.938rem;
}

.safety-tips p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Checklist */
.checklist-section {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border: 1px solid rgba(102, 126, 234, 0.3);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.checklist-section h5 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 24px;
    text-align: center;
}

.checklist {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.checklist-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.checkbox {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    background: var(--success-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 700;
    color: var(--bg-primary);
    flex-shrink: 0;
}

.checklist-item p {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* Coming Soon Section */
.coming-soon-section {
    padding: 100px 20px;
}

.coming-soon-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
}

.coming-soon-card {
    background: var(--bg-card);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 48px;
    text-align: center;
    transition: all var(--transition-base);
}

.coming-soon-card:hover {
    border-color: rgba(102, 126, 234, 0.5);
    transform: translateY(-4px);
}

.coming-soon-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 24px;
    color: var(--text-secondary);
}

.coming-soon-icon {
    font-size: 4rem;
    margin-bottom: 24px;
}

.coming-soon-card h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.coming-soon-card > p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.6;
}

.coming-soon-features {
    text-align: left;
    background: rgba(255, 255, 255, 0.03);
    padding: 24px;
    border-radius: var(--radius-md);
    margin-bottom: 32px;
}

.coming-soon-features h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.coming-soon-features ul {
    list-style: none;
}

.coming-soon-features li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    color: var(--text-secondary);
}

.coming-soon-features li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: #667eea;
}

.notify-button {
    display: inline-block;
    padding: 14px 32px;
    background: var(--primary-gradient);
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
}

.notify-button:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

/* Footer */
.footer {
    padding: 60px 20px;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer-text {
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: 8px;
}

.footer-subtitle {
    color: var(--text-secondary);
    font-size: 0.938rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3.5rem;
    }

    .subtitle {
        font-size: 1.5rem;
    }

    .section-title {
        font-size: 2.5rem;
    }

    .comparison-section {
        grid-template-columns: 1fr;
    }

    .comparison-divider {
        transform: rotate(90deg);
    }

    .prompt-comparison {
        grid-template-columns: 1fr;
    }

    .prompt-arrow {
        transform: rotate(90deg);
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .subtitle {
        font-size: 1.25rem;
    }

    .hero-stats {
        gap: 40px;
    }

    .stat-number {
        font-size: 2rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .course-section {
        padding: 60px 32px;
    }

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

    .timeline::before {
        left: 20px;
    }

    .timeline-item,
    .timeline-item:nth-child(even) {
        padding-left: 60px;
        padding-right: 0;
        text-align: left;
    }

    .timeline-marker {
        left: 20px;
    }

    .program-cards,
    .coming-soon-grid {
        grid-template-columns: 1fr;
    }

    .homework-section {
        flex-direction: column;
        text-align: center;
    }

    .day-navigation {
        flex-direction: column;
    }

    .nav-btn {
        justify-content: center !important;
    }
}

@media (max-width: 480px) {
    .company-logo {
        width: 40px;
        height: 40px;
        font-size: 1.25rem;
    }

    .company-name {
        font-size: 1.25rem;
    }

    .company-tagline {
        font-size: 0.75rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: 32px;
    }

    section {
        padding: 60px 20px;
    }

    .course-section {
        padding: 40px 24px;
    }

    .model-types,
    .safety-grid {
        grid-template-columns: 1fr;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Selection */
::selection {
    background: rgba(102, 126, 234, 0.3);
    color: var(--text-primary);
}