/* Unified history article stylesheet
  Combines layout, components, comparison tables, timeline, cards, pull quotes */

/* Spacing Scale Tokens */
:root {
  --space-0: 0;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-7: 1.75rem;
  --space-8: 2rem;
  --space-9: 2.5rem;
  --space-10: 3rem;
}

/* Layout & Structure */
.terminal-main.with-sidebar { display: flex; align-items: flex-start; gap: var(--space-8); }
.sidebar-nav { position: sticky; top: 5rem; max-height: calc(100vh - 6rem); overflow-y: auto; padding: var(--space-2) var(--space-3); border-left: 2px solid var(--accent-glow, #3af); }
.sidebar-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: var(--space-2); }
.sidebar-nav a { text-decoration: none; font-size: 0.9rem; font-weight: 500; color: var(--text-secondary, #9ab); padding: var(--space-2) var(--space-3); border-radius: 4px; line-height: 1.3; display: block; }
.sidebar-nav a:hover, .sidebar-nav a:focus { color: var(--text-primary, #fff); background: rgba(255,255,255,0.06); }
.sidebar-nav a.active { background: linear-gradient(90deg, var(--accent-glow,#3af) 0%, rgba(58,175,255,0.15) 100%); color: #fff; }
.sidebar-nav a[aria-current="true"] { outline: 1px solid var(--accent-glow,#3af); }

.container-terminal { flex: 1; }
.section { max-width: 80ch; }
.section h1 { font-size: 1.95rem; margin: 0 0 var(--space-5); line-height: 1.2; }
.section h2 { margin-top: calc(var(--space-9) - var(--space-2)); margin-bottom: var(--space-3); font-size: 1.35rem; }
.section h3 { margin-top: calc(var(--space-6) + var(--space-1)); margin-bottom: var(--space-2); font-size: 1.05rem; letter-spacing: 0.5px; text-transform: uppercase; opacity: 0.9; }
.section p { line-height: 1.55; margin: 0 0 var(--space-5); }
.section ul {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--space-5);
}
.section ul li {
    margin-bottom: var(--space-2);
}
.section ul li a {
    color: var(--neon-accent);
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    text-shadow: 0 0 5px var(--neon-accent);
}
.section ul li a:hover {
    text-shadow: 0 0 15px var(--neon-accent);
    color: #fff;
}

/* Blockquotes & Pull Quotes */
blockquote { margin: var(--space-5) 0; padding: var(--space-4) var(--space-5); background: rgba(255,255,255,0.04); border-left: 3px solid var(--accent-glow,#3af); font-style: italic; line-height: 1.5; }
blockquote.pull-quote { float: right; max-width: 18rem; margin: var(--space-1) 0 var(--space-4) var(--space-5); font-size: 0.95rem; background: rgba(255,255,255,0.06); }
blockquote.pull-quote cite { display: block; font-style: normal; margin-top: var(--space-3); font-size: 0.75rem; opacity: 0.7; text-transform: uppercase; letter-spacing: 0.5px; }

/* Cards */
.card-container { display: grid; gap: var(--space-4); grid-template-columns: repeat(auto-fit,minmax(220px,1fr)); margin: var(--space-6) 0 var(--space-8); }
.card { background: linear-gradient(135deg, rgba(255,255,255,0.05), rgba(255,255,255,0.02)); padding: var(--space-4) var(--space-4) calc(var(--space-4) + 0.1rem); border: 1px solid rgba(255,255,255,0.1); border-radius: 10px; backdrop-filter: blur(4px); transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s; }
.card h4 { margin: 0 0 var(--space-2); font-size: 0.95rem; letter-spacing: 0.5px; text-transform: uppercase; color: var(--accent-glow,#3af); }
.card p { margin: 0; font-size: 0.8rem; line-height: 1.4; }
.card:hover { border-color: var(--accent-glow,#3af); transform: translateY(-4px); box-shadow: 0 6px 18px -6px rgba(0,0,0,0.5), 0 0 0 1px rgba(58,175,255,0.2); }

/* Comparison Table */
.comparison-table { margin: var(--space-7) 0 var(--space-9); border: 1px solid rgba(255,255,255,0.15); border-radius: 10px; overflow: hidden; background: rgba(255,255,255,0.03); }
.comparison-table table { width: 100%; border-collapse: collapse; font-size: 0.8rem; }
.comparison-table thead { background: linear-gradient(90deg, rgba(58,175,255,0.2), rgba(58,175,255,0)); }
.comparison-table th, .comparison-table td { padding: var(--space-3) var(--space-3); text-align: left; vertical-align: top; border-bottom: 1px solid rgba(255,255,255,0.09); }
.comparison-table tbody tr:last-child td { border-bottom: none; }
.comparison-table th { font-size: 0.72rem; letter-spacing: 0.5px; text-transform: uppercase; color: var(--accent-glow,#3af); }
.comparison-table tbody tr:hover { background: rgba(255,255,255,0.04); }

/* Timeline */
.timeline { position: relative; margin: var(--space-8) 0 var(--space-9) 0; padding-left: var(--space-5); }
.timeline:before { content: ""; position: absolute; top: 0; bottom: 0; left: 0.35rem; width: 2px; background: linear-gradient(to bottom, var(--accent-glow,#3af), transparent); opacity: 0.6; }
.timeline-item { position: relative; margin-bottom: calc(var(--space-5) + var(--space-1)); display: flex; gap: calc(var(--space-3) + 0.1rem); }
.timeline-item:last-child { margin-bottom: 0; }
.timeline-year { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.5px; text-transform: uppercase; color: var(--accent-glow,#3af); padding-top: var(--space-1); min-width: 3.2rem; }
.timeline-content p { margin: 0; font-size: 0.8rem; line-height: 1.45; }

/* Utilities */
.terminal-ruler { height: 2px; background: linear-gradient(90deg, rgba(255,255,255,0.15), rgba(255,255,255,0)); margin: 0 0 var(--space-6); }
.footer { margin-top: var(--space-10); }

/* Responsive */
@media (max-width: 960px) {
  .terminal-main.with-sidebar { flex-direction: column; }
  .sidebar-nav { position: static; max-height: none; border-left: none; border-top: 2px solid var(--accent-glow,#3af); display: flex; width: 100%; }
  .sidebar-nav ul { flex-direction: row; flex-wrap: wrap; gap: var(--space-2) var(--space-3); }
  .sidebar-nav a { font-size: 0.75rem; padding: var(--space-2) var(--space-3); }
  blockquote.pull-quote { float: none; max-width: 100%; margin: var(--space-6) 0; }
}

@media (max-width: 600px) {
  .section h1 { font-size: 1.55rem; }
  .section h2 { font-size: 1.15rem; }
  .card-container { grid-template-columns: repeat(auto-fit,minmax(160px,1fr)); }
  .comparison-table table { font-size: 0.7rem; }
}