/* ==========================================
   WEB WITHOUT SEARCH — Design System
   Palette: Void Black, Terminal Green, Link Blue, Parchment
   ========================================== */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Space+Mono:ital,wght@0,400;0,700;1,400&family=Lora:ital,wght@0,400;1,400;1,600&display=swap');

:root {
  --void: #0a0a0f;
  --surface: #111118;
  --surface-2: #1a1a24;
  --border: #2a2a3a;
  --link-blue: #4a9eff;
  --link-blue-dim: #2a6eb8;
  --terminal: #00e5a0;
  --terminal-dim: #00a070;
  --parchment: #f0ead8;
  --parchment-dim: #b8b09a;
  --white: #ffffff;
  --text-primary: #e8e4f0;
  --text-secondary: #8880a0;
  --accent-red: #ff6b6b;

  --font-display: 'Space Grotesk', sans-serif;
  --font-mono: 'Space Mono', monospace;
  --font-serif: 'Lora', serif;

  --max-w: 1100px;
  --nav-h: 64px;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--void);
  color: var(--text-primary);
  font-family: var(--font-display);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--surface); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--link-blue-dim); }

/* ── SELECTION ── */
::selection { background: var(--link-blue); color: var(--void); }

/* ── NAV ── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: rgba(10,10,15,0.88);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  display: flex;
  align-items: center;
  padding: 0 2rem;
  gap: 2rem;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--terminal);
  text-decoration: none;
  letter-spacing: 0.05em;
  flex-shrink: 0;
}
.nav-logo span { color: var(--text-secondary); }

.nav-links {
  display: flex;
  gap: 0.25rem;
  list-style: none;
  margin-left: auto;
  flex-wrap: wrap;
}

.nav-links a {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.35rem 0.75rem;
  border-radius: 4px;
  transition: color 0.2s, background 0.2s;
  letter-spacing: 0.03em;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--link-blue);
  background: rgba(74,158,255,0.08);
}

/* ── MAIN WRAPPER ── */
main { padding-top: var(--nav-h); }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
}

/* ── HERO ── */
.hero {
  min-height: calc(100vh - var(--nav-h));
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 4rem 2rem;
}

.hero-canvas {
  position: absolute;
  inset: 0;
  opacity: 0.35;
}

.hero-content {
  position: relative;
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--terminal);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.hero-eyebrow::before {
  content: '';
  display: block;
  width: 2rem;
  height: 1px;
  background: var(--terminal);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  max-width: 800px;
}

.hero h1 em {
  font-style: normal;
  color: var(--link-blue);
}

.hero-sub {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 3rem;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--link-blue);
  color: var(--void);
  font-weight: 700;
}
.btn-primary:hover { background: #6ab4ff; transform: translateY(-1px); box-shadow: 0 8px 24px rgba(74,158,255,0.25); }

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-outline:hover { border-color: var(--text-secondary); color: var(--text-primary); }

/* ── SECTION COMMON ── */
section {
  padding: 5rem 2rem;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--terminal);
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.15;
  margin-bottom: 1rem;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 560px;
  line-height: 1.8;
  font-family: var(--font-serif);
  font-style: italic;
}

/* ── DIVIDER ── */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0 2rem;
}

/* ── METHOD CARDS ── */
.methods-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin-top: 3rem;
}

.method-card {
  background: var(--surface);
  padding: 2rem;
  text-decoration: none;
  color: inherit;
  transition: background 0.2s;
  display: block;
}
.method-card:hover { background: var(--surface-2); }

.method-icon {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  display: block;
}

.method-num {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-secondary);
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.method-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.method-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.method-tag {
  display: inline-block;
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--link-blue);
  letter-spacing: 0.05em;
}

/* ── TIMELINE ── */
.timeline {
  position: relative;
  margin-top: 3rem;
  padding-left: 2rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--terminal), transparent);
}

.tl-item {
  position: relative;
  padding-bottom: 3rem;
}
.tl-item::before {
  content: '';
  position: absolute;
  left: -2.3rem;
  top: 0.4rem;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--terminal);
  box-shadow: 0 0 12px var(--terminal);
}

.tl-year {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--terminal);
  letter-spacing: 0.1em;
  margin-bottom: 0.4rem;
}

.tl-item h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  letter-spacing: -0.01em;
}

.tl-item p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 600px;
}

/* ── QUOTE BLOCK ── */
.quote-block {
  border-left: 3px solid var(--link-blue);
  padding: 1.5rem 2rem;
  background: var(--surface);
  border-radius: 0 8px 8px 0;
  margin: 2rem 0;
}
.quote-block blockquote {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--parchment);
}
.quote-block cite {
  display: block;
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-secondary);
  font-style: normal;
  letter-spacing: 0.05em;
}

/* ── INFO TABLE ── */
.info-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 2rem;
  font-size: 0.88rem;
}
.info-table th {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  text-align: left;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
}
.info-table td {
  padding: 0.9rem 1rem;
  border-bottom: 1px solid rgba(42,42,58,0.5);
  color: var(--text-primary);
  vertical-align: top;
}
.info-table tr:hover td { background: var(--surface); }
.info-table .td-mono {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--terminal);
}
.info-table .td-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--link-blue);
  background: rgba(74,158,255,0.08);
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  display: inline-block;
}

/* ── PAGE HERO (inner pages) ── */
.page-hero {
  padding: 5rem 2rem 3rem;
  border-bottom: 1px solid var(--border);
}
.page-hero .container { max-width: var(--max-w); margin: 0 auto; }

.page-hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1rem;
}

.page-hero .lead {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.8;
}

/* ── ARTICLE LAYOUT ── */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 4rem;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 4rem 2rem;
  align-items: start;
}
@media (max-width: 768px) {
  .article-layout { grid-template-columns: 1fr; }
}

.article-body h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 2.5rem 0 1rem;
  color: var(--text-primary);
}
.article-body h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
  color: var(--text-primary);
}
.article-body p {
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 1.25rem;
  font-size: 0.95rem;
}
.article-body p strong {
  color: var(--text-primary);
  font-weight: 600;
}
.article-body a {
  color: var(--link-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-sidebar {
  position: sticky;
  top: calc(var(--nav-h) + 2rem);
}

.sidebar-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}
.sidebar-box h4 {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--terminal);
  margin-bottom: 1rem;
}
.sidebar-box ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.sidebar-box ul li a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}
.sidebar-box ul li a:hover { color: var(--link-blue); }

.sidebar-stat {
  text-align: center;
  padding: 1rem;
}
.sidebar-stat .stat-num {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--terminal);
  display: block;
}
.sidebar-stat .stat-label {
  font-size: 0.78rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

/* ── CARD GRID ── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  margin-top: 2.5rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  text-decoration: none;
  color: inherit;
  display: block;
  transition: border-color 0.2s, transform 0.2s;
}
.card:hover {
  border-color: var(--link-blue-dim);
  transform: translateY(-2px);
}
.card-kicker {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--terminal);
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}
.card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}
.card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ── TAGS ── */
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.6rem;
  border-radius: 3px;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  margin: 0.2rem;
}
.tag.blue { border-color: var(--link-blue-dim); color: var(--link-blue); background: rgba(74,158,255,0.06); }
.tag.green { border-color: var(--terminal-dim); color: var(--terminal); background: rgba(0,229,160,0.06); }
.tag.red { border-color: #994444; color: var(--accent-red); background: rgba(255,107,107,0.06); }

/* ── CODE BLOCK ── */
.code-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--parchment);
  overflow-x: auto;
  margin: 1.5rem 0;
}
.code-block .comment { color: var(--text-secondary); }
.code-block .key { color: var(--terminal); }
.code-block .val { color: var(--link-blue); }

/* ── FOOTER ── */
footer {
  border-top: 1px solid var(--border);
  padding: 3rem 2rem;
  margin-top: 4rem;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: end;
}
.footer-brand {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-secondary);
}
.footer-brand strong {
  display: block;
  color: var(--terminal);
  font-size: 0.85rem;
  margin-bottom: 0.35rem;
}
.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}
.footer-links a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-decoration: none;
}
.footer-links a:hover { color: var(--link-blue); }

/* ── ANIMATIONS ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-up { animation: fadeUp 0.6s ease both; }
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.35s; }
.delay-4 { animation-delay: 0.5s; }

@media (prefers-reduced-motion: reduce) {
  .fade-up { animation: none; }
}

/* ── RESPONSIVE ── */
@media (max-width: 640px) {
  nav { padding: 0 1rem; gap: 1rem; }
  .nav-links a { font-size: 0.72rem; padding: 0.3rem 0.5rem; }
  section { padding: 3rem 1rem; }
  .hero { padding: 2rem 1rem; }
  .footer-inner { grid-template-columns: 1fr; }
}