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

:root {
    --color-bg: #fafafa;
    --color-surface: #ffffff;
    --color-text: #1a1a1a;
    --color-text-muted: #666666;
    --color-border: #e5e5e5;
    --color-accent: #2563eb;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
header {
    padding: 80px 0 60px;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}

.tagline {
    color: var(--color-text-muted);
    font-size: 1.1rem;
}

/* Projects Section */
.projects h2 {
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-bottom: 24px;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
    margin-bottom: 60px;
}

/* Project Card */
.project-card {
    background: var(--color-surface);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
}

.project-image {
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    background: var(--color-border);
}

.project-image-placeholder {
    width: 100%;
    aspect-ratio: 16 / 10;
    background: linear-gradient(135deg, #e5e5e5 0%, #f5f5f5 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.project-content {
    padding: 20px;
}

.project-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--color-text);
}

.project-date {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: 12px;
}

.project-description {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

/* Footer */
footer {
    padding: 40px 0;
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
    border-top: 1px solid var(--color-border);
}

/* Responsive */
@media (max-width: 600px) {
    header {
        padding: 60px 0 40px;
    }

    header h1 {
        font-size: 2rem;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }
}