:root {
    --bg-dark: #0a0a0f;
    --bg-card: #12121a;
    --bg-card-hover: #1a1a25;
    --border: #2a2a3a;
    --text-primary: #e8e8f0;
    --text-secondary: #8888a0;
    --text-muted: #55556a;
    --accent-gold: #d4a853;
    --accent-gold-dim: #a8843f;
    --accent-cyan: #4ecdc4;
    --accent-purple: #a78bfa;
    --accent-rose: #f472b6;
    --accent-orange: #fb923c;
    --accent-green: #4ade80;
    --accent-blue: #60a5fa;
    --glow-gold: rgba(212, 168, 83, 0.15);
}

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

body {
    font-family: 'Space Grotesk', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* Subtle grid background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(212, 168, 83, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(212, 168, 83, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 0;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 1;
}

/* Header */
header {
    padding: 6rem 0 4rem;
    text-align: center;
    position: relative;
}

header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-gold), transparent);
}

.title-wrapper {
    position: relative;
    display: inline-block;
}

h1 {
    font-family: 'Instrument Serif', serif;
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 400;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

h1 span {
    color: var(--accent-gold);
    font-style: italic;
}

.subtitle {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.9rem;
    color: var(--text-secondary);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.intro {
    max-width: 700px;
    margin: 2rem auto 0;
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.8;
}

/* Era sections */
.era-section {
    margin: 4rem 0;
    animation: fadeInUp 0.6s ease-out forwards;
    opacity: 0;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.era-section:nth-child(1) { animation-delay: 0.1s; }
.era-section:nth-child(2) { animation-delay: 0.2s; }
.era-section:nth-child(3) { animation-delay: 0.3s; }
.era-section:nth-child(4) { animation-delay: 0.4s; }
.era-section:nth-child(5) { animation-delay: 0.5s; }
.era-section:nth-child(6) { animation-delay: 0.6s; }

.era-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.era-badge {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.era-badge.legends {
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
    color: var(--bg-dark);
}

.era-badge.veterans {
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-rose));
    color: var(--bg-dark);
}

.era-badge.established {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
    color: var(--bg-dark);
}

.era-badge.mature {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    color: var(--bg-dark);
}

.era-badge.proven {
    background: linear-gradient(135deg, var(--accent-rose), var(--accent-purple));
    color: var(--bg-dark);
}

.era-badge.rising {
    background: linear-gradient(135deg, var(--accent-green), var(--accent-cyan));
    color: var(--bg-dark);
}

.era-title {
    font-family: 'Instrument Serif', serif;
    font-size: 1.8rem;
    font-weight: 400;
    color: var(--text-primary);
}

.era-title em {
    color: var(--text-secondary);
    font-style: italic;
}

/* Software grid */
.software-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 1.25rem;
}

.software-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.software-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--card-accent, var(--accent-gold)), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.software-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--card-accent, var(--accent-gold));
    transform: translateY(-2px);
}

.software-card:hover::before {
    opacity: 1;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.software-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.software-name a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
}

.software-name a:hover {
    color: var(--card-accent, var(--accent-gold));
}

.software-name a::after {
    content: ' ↗';
    font-size: 0.8em;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.software-card:hover .software-name a::after {
    opacity: 0.6;
}

.years-badge {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    background: var(--glow-gold);
    border: 1px solid var(--accent-gold-dim);
    border-radius: 20px;
    color: var(--accent-gold);
    white-space: nowrap;
}

.card-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 0.75rem;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.8rem;
}

.meta-item {
    color: var(--text-muted);
}

.meta-item strong {
    color: var(--text-secondary);
}

.card-category {
    display: inline-block;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 0.25rem 0.5rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 3px;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.card-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Traits section */
.traits-section {
    margin: 6rem 0;
    padding: 3rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    position: relative;
}

.traits-section::before {
    content: '✦';
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 1.5rem;
    color: var(--accent-gold);
    background: var(--bg-dark);
    padding: 0 1rem;
}

.traits-title {
    font-family: 'Instrument Serif', serif;
    font-size: 1.8rem;
    text-align: center;
    margin-bottom: 2.5rem;
    color: var(--text-primary);
}

.traits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.trait {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.trait-number {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.8rem;
    font-weight: 600;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glow-gold);
    border: 1px solid var(--accent-gold-dim);
    border-radius: 50%;
    color: var(--accent-gold);
    flex-shrink: 0;
}

.trait-content h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.trait-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Footer */
footer {
    text-align: center;
    padding: 4rem 0;
    border-top: 1px solid var(--border);
    margin-top: 4rem;
}

.footer-text {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-text span {
    color: var(--accent-gold);
}

/* Index-specific sections */
.article-section {
    margin: 4rem 0 2rem;
}

.section-heading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.section-label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.article-section h2 {
    font-family: 'Instrument Serif', serif;
    font-size: clamp(1.8rem, 4vw, 2.4rem);
    font-weight: 400;
}

.article-grid {
    margin-top: 1rem;
}

.article-card {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.article-status {
    padding: 0.15rem 0.75rem;
    border-radius: 999px;
    border: 1px solid transparent;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 600;
}

.article-status.live {
    border-color: var(--accent-gold);
    color: var(--accent-gold);
}

.article-status.soon {
    border-color: var(--text-muted);
    color: var(--text-muted);
}

.article-title {
    font-size: 1.4rem;
    font-weight: 600;
}

.article-summary {
    color: var(--text-secondary);
}

.article-link {
    align-self: flex-start;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--card-accent, var(--accent-gold));
    text-decoration: none;
    display: inline-flex;
    gap: 0.5rem;
    align-items: center;
    padding: 0.5rem 0;
}

.article-link::after {
    content: '↗';
    font-size: 0.85rem;
}

.article-link:hover {
    color: var(--text-primary);
}

.article-link.unavailable {
    color: var(--text-muted);
    pointer-events: none;
}

.article-link.unavailable::after {
    content: '…';
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }

    header {
        padding: 4rem 0 3rem;
    }

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

    .era-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .traits-section {
        padding: 2rem 1.5rem;
    }

    .article-meta {
        flex-direction: column;
        gap: 0.25rem;
    }
}