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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #fff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: #000;
    color: #fff;
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 900;
    letter-spacing: 2px;
}

nav a {
    color: #fff;
    text-decoration: none;
    margin-left: 2rem;
    font-weight: 600;
    transition: color 0.3s;
}

nav a:hover {
    color: #00D9FF;
}

/* Hero */
.hero {
    background: linear-gradient(135deg, #000 0%, #1a1a1a 100%);
    color: #fff;
    padding: 5rem 0;
    text-align: center;
}

.hero h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 900;
}

.hero p {
    font-size: 1.3rem;
    color: #ccc;
    max-width: 800px;
    margin: 0.5rem auto;
}

.subtitle {
    font-size: 1.1rem;
    color: #00D9FF;
    font-weight: 600;
    margin-top: 1.5rem;
}

/* Story Section */
.story {
    padding: 5rem 0;
    background: #fff;
}

.story h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
    font-weight: 900;
}

.timeline {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 120px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: #00D9FF;
}

.timeline-item {
    display: flex;
    margin-bottom: 3rem;
    position: relative;
}

.timeline-item .date {
    flex: 0 0 100px;
    font-weight: 700;
    color: #00D9FF;
    padding-top: 0.5rem;
}

.timeline-item .content {
    flex: 1;
    margin-left: 40px;
    background: #f8f8f8;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.timeline-item .content h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #000;
}

.timeline-item .content p {
    color: #555;
    margin-bottom: 0.75rem;
    font-size: 1.05rem;
}

/* Progress Section */
.progress {
    padding: 5rem 0;
    background: #f8f8f8;
}

.progress h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    font-weight: 900;
}

.progress-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.progress-card {
    background: #fff;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: transform 0.3s;
}

.progress-card:hover {
    transform: translateY(-5px);
}

.progress-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #000;
}

.progress-card p {
    color: #666;
    margin-bottom: 1rem;
    font-size: 1.05rem;
}

.progress-card p strong {
    color: #00D9FF;
}

/* Tech Section */
.tech {
    padding: 5rem 0;
    background: #fff;
}

.tech h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    font-weight: 900;
}

.tech-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
}

.tech-section h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: #000;
    border-bottom: 3px solid #00D9FF;
    padding-bottom: 0.5rem;
}

.tech-section ul {
    list-style: none;
}

.tech-section li {
    padding: 0.75rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: #555;
    font-size: 1.05rem;
}

.tech-section li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: #00D9FF;
    font-weight: bold;
}

/* Bootstrap Section */
.bootstrap {
    padding: 4rem 0;
    background: linear-gradient(135deg, #1a1a1a 0%, #000 100%);
    color: #fff;
}

.bootstrap h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    font-weight: 900;
}

.bootstrap-content {
    max-width: 900px;
    margin: 0 auto;
}

.bootstrap-content p {
    font-size: 1.15rem;
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.bootstrap-content p strong {
    color: #00D9FF;
}

.bootstrap-content .highlight {
    background: #1a1a1a;
    padding: 2rem;
    border-radius: 8px;
    border-left: 4px solid #00D9FF;
    margin-top: 2rem;
    font-size: 1.2rem;
    font-weight: 600;
}

/* Contact */
.contact {
    background: #000;
    color: #fff;
    padding: 4rem 0;
    text-align: center;
}

.contact h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.contact p {
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

/* Footer */
footer {
    background: #1a1a1a;
    color: #ccc;
    text-align: center;
    padding: 2rem 0;
    font-size: 0.9rem;
}

.footer-note {
    margin-top: 0.5rem;
    color: #00D9FF;
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    nav a {
        margin: 0 1rem;
    }
    
    .hero h2 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1.1rem;
    }
    
    .timeline::before {
        left: 80px;
    }
    
    .timeline-item .date {
        flex: 0 0 70px;
        font-size: 0.9rem;
    }
    
    .timeline-item .content {
        margin-left: 20px;
    }
    
    .story h2, .progress h2, .tech h2, .bootstrap h2, .contact h2 {
        font-size: 2rem;
    }
    
    .tech-content {
        grid-template-columns: 1fr;
    }
}