/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #fafafa;
    color: #333;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header styles */
.header {
    text-align: center;
    padding: 60px 0 40px;
}

.title {
    font-size: 3.5rem;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 10px;
    letter-spacing: -0.02em;
}

.subtitle {
    font-size: 1.2rem;
    color: #666;
    font-weight: 400;
}

/* Main content */
.main {
    flex: 1;
    padding: 40px 0;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

/* Project card styles */
.project-card {
    background: white;
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    cursor: pointer;
    border: 1px solid #f0f0f0;
    position: relative;
    overflow: hidden;
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.12);
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.project-card:hover::before {
    transform: scaleX(1);
}

.project-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 12px;
}

.project-description {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.5;
}

.project-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: #888;
}

.project-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.project-tag {
    background: #f0f0f0;
    color: #666;
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* Footer */
.footer {
    text-align: center;
    padding: 40px 0;
    color: #888;
    font-size: 0.9rem;
}

/* Responsive design */
@media (max-width: 768px) {
    .title {
        font-size: 2.5rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .contact-row {
        gap: 20px;
        margin-top: 15px;
    }
    
    .contact-link {
        padding: 6px 12px;
        font-size: 0.85rem;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .project-card {
        padding: 20px;
    }
    
    .container {
        padding: 0 15px;
    }
}

/* Loading animation */
.loading {
    text-align: center;
    padding: 60px 0;
    color: #666;
}

.loading::after {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: 10px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Smooth transitions */
.project-card,
.project-title,
.project-description {
    transition: all 0.3s ease;
}

/* Focus states for accessibility */
.project-card:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    body {
        background: #1a1a1a;
        color: #f0f0f0;
    }
    
    .project-card {
        background: #2a2a2a;
        border-color: #333;
    }
    
    .title {
        color: #f0f0f0;
    }
    
    .subtitle {
        color: #aaa;
    }
    
    .project-title {
        color: #f0f0f0;
    }
    
    .project-description {
        color: #aaa;
    }
    
    .project-tag {
        background: #333;
        color: #aaa;
    }
    
    .contact-link {
        background: rgba(102, 126, 234, 0.2);
        border-color: rgba(102, 126, 234, 0.3);
    }
    
    .contact-link:hover {
        background: #667eea;
        color: white;
    }
}

.contact-row {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
    text-decoration: none;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 1px solid rgba(102, 126, 234, 0.2);
}

.contact-link:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.contact-link:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}