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

:root {
    --color-bg: #0a0a0a;
    --color-surface: #141414;
    --color-border: #2a2a2a;
    --color-text: #ffffff;
    --color-text-muted: #888888;
    --color-accent: #00ff88;
    --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

[data-theme="light"] {
    --color-bg: #f5f5f5;
    --color-surface: #ffffff;
    --color-border: #e0e0e0;
    --color-text: #1a1a1a;
    --color-text-muted: #666666;
    --color-accent: #00aa55;
}

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

/* Home Layout */
.home {
    min-height: 100vh;
    padding: 4rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.home__header {
    text-align: center;
    margin-bottom: 4rem;
    position: relative;
}

.theme-toggle {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.2s;
}

.theme-toggle:hover {
    border-color: var(--color-accent);
}

.home__header h1 {
    font-size: 3rem;
    font-weight: 300;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

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

/* Experiment Grid */
.home__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.experiment-card {
    display: block;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 1.5rem;
    text-decoration: none;
    color: inherit;
    transition: all 0.2s ease;
}

.experiment-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

.experiment-card__number {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-accent);
    margin-bottom: 0.75rem;
}

.experiment-card__title {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.experiment-card__description {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.experiment-card__meta {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    font-size: 0.8rem;
    gap: 0.75rem;
}

.experiment-card__date {
    font-family: var(--font-mono);
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.experiment-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    justify-content: flex-end;
}

.tag {
    background: var(--color-border);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
    text-transform: lowercase;
}