:root {
    --color-ink: #2c2c2c;
    --color-ink-lighter: #666;
    --color-paper: #f9f7f4;
    --color-vermillion: #d84315;
    --color-jade: #2e7d32;
    --color-gold: #f57c00;
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
}

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

body {
    font-family: 'Crimson Pro', serif;
    background: var(--color-paper);
    color: var(--color-ink);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-xl) var(--space-lg);
    position: relative;
}

.bg-decoration {
    position: fixed;
    top: 0;
    right: 0;
    width: 40%;
    height: 100vh;
    background: linear-gradient(135deg,
        rgba(216, 67, 21, 0.03) 0%,
        rgba(46, 125, 50, 0.03) 100%);
    pointer-events: none;
    z-index: 0;
}

.header {
    text-align: center;
    margin-bottom: var(--space-xl);
    position: relative;
    z-index: 1;
}

.logo {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.logo-en {
    font-family: 'Crimson Pro', serif;
    color: var(--color-ink);
    letter-spacing: -0.02em;
}

.tagline {
    font-size: 1.2rem;
    color: var(--color-ink-lighter);
    font-style: italic;
}

.projects {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
    position: relative;
    z-index: 1;
}

.project-card {
    background: white;
    border: 2px solid rgba(44, 44, 44, 0.1);
    border-radius: 12px;
    padding: var(--space-lg);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--color-vermillion), var(--color-gold));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

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

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    border-color: var(--color-vermillion);
}

.project-card.coming-soon {
    opacity: 0.7;
}

.project-card.coming-soon::before {
    background: linear-gradient(90deg, var(--color-ink-lighter), var(--color-ink));
}

.project-icon {
    font-size: 3rem;
    margin-bottom: var(--space-sm);
    font-family: 'Noto Serif SC', serif;
}

.project-title {
    font-family: 'Crimson Pro', serif;
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: var(--space-sm);
}

.project-description {
    color: var(--color-ink-lighter);
    margin-bottom: var(--space-md);
    line-height: 1.7;
}

.project-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-md);
}

.feature {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    background: rgba(216, 67, 21, 0.1);
    color: var(--color-vermillion);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    border: 1px solid rgba(216, 67, 21, 0.2);
}

.project-link {
    display: inline-block;
    font-family: 'Crimson Pro', serif;
    font-size: 1.1rem;
    font-weight: 600;
    color: white;
    background: var(--color-vermillion);
    padding: 0.75rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.project-link:hover {
    background: var(--color-gold);
    transform: translateX(4px);
}

.project-status {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: var(--color-ink-lighter);
    padding: 0.5rem 1rem;
    background: rgba(44, 44, 44, 0.05);
    border-radius: 6px;
    display: inline-block;
}

.footer {
    text-align: center;
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(44, 44, 44, 0.1);
    color: var(--color-ink-lighter);
    font-style: italic;
    position: relative;
    z-index: 1;
}

@media (max-width: 768px) {
    .logo {
        font-size: 2rem;
    }

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

    .container {
        padding: var(--space-lg) var(--space-md);
    }
}