:root {
  --bg: #0a0a0f;
  --surface: #15151f;
  --surface-hover: #1c1c2a;
  --accent: #6c5ce7;
  --accent-hover: #8475ec;
  --accent-glow: rgba(108, 92, 231, 0.35);
  --text: #f5f5fa;
  --text-muted: #a0a0c0;
  --text-dim: #6b6b85;
  --border: #2a2a3e;
  --code-bg: #0f0f17;
  --success: #4ade80;
  --warning: #fbbf24;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "JetBrains Mono", Menlo, Consolas, monospace;

  --radius: 12px;
  --radius-sm: 8px;

  --max-w: 960px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(15px, 0.95rem + 0.1vw, 17px);
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(at 20% -10%, rgba(108, 92, 231, 0.18), transparent 50%),
    radial-gradient(at 90% 0%, rgba(108, 92, 231, 0.1), transparent 45%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
  text-underline-offset: 3px;
}

h1, h2, h3, h4 {
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.2;
  margin: 2.5rem 0 1rem;
  color: var(--text);
}

h1 {
  font-size: clamp(2rem, 1.6rem + 2vw, 3.2rem);
  letter-spacing: -0.025em;
  margin-top: 0;
}

h2 {
  font-size: clamp(1.4rem, 1.2rem + 1vw, 1.85rem);
  padding-top: 0.5rem;
}

h3 {
  font-size: clamp(1.15rem, 1.05rem + 0.4vw, 1.3rem);
}

p, ul, ol {
  margin: 0 0 1.1rem;
}

ul, ol {
  padding-left: 1.4rem;
}

li {
  margin-bottom: 0.4rem;
}

li::marker {
  color: var(--text-dim);
}

code, pre {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

p code, li code, td code {
  background: var(--code-bg);
  border: 1px solid var(--border);
  padding: 0.1em 0.4em;
  border-radius: 5px;
  color: var(--text);
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  overflow-x: auto;
  position: relative;
  margin: 1.4rem 0;
  font-size: 0.84rem;
  line-height: 1.55;
}

pre code {
  background: transparent;
  border: 0;
  padding: 0;
  color: var(--text);
}

.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--surface);
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 10px;
  font-size: 11px;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all 0.15s ease;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.copy-btn:hover {
  background: var(--surface-hover);
  color: var(--text);
  border-color: var(--accent);
}

.copy-btn.copied {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.2rem 0;
  font-size: 0.92rem;
  display: block;
  overflow-x: auto;
  white-space: nowrap;
}

@media (min-width: 720px) {
  table {
    display: table;
    white-space: normal;
  }
}

th, td {
  text-align: left;
  padding: 0.6rem 0.85rem;
  border-bottom: 1px solid var(--border);
}

th {
  background: var(--surface);
  color: var(--text);
  font-weight: 600;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom-color: var(--accent);
}

tr:hover td {
  background: rgba(108, 92, 231, 0.04);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border);
}

.site-header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  letter-spacing: -0.01em;
}

.brand:hover {
  text-decoration: none;
  color: var(--text);
}

.brand-mark {
  width: 26px;
  height: 26px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--accent), #b65cdc);
  box-shadow: 0 0 18px var(--accent-glow);
  display: grid;
  place-items: center;
  color: white;
  font-weight: 800;
  font-size: 13px;
  font-family: var(--font-mono);
}

.nav {
  display: flex;
  gap: 1.25rem;
  font-size: 0.9rem;
}

.nav a {
  color: var(--text-muted);
  white-space: nowrap;
}

.nav a:hover {
  color: var(--text);
  text-decoration: none;
}

.nav a.active {
  color: var(--text);
}

main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

.hero {
  padding: 2.5rem 0 1.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2.5rem;
}

.hero p.lead {
  font-size: clamp(1.05rem, 0.95rem + 0.5vw, 1.25rem);
  color: var(--text-muted);
  max-width: 60ch;
  line-height: 1.55;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.15rem;
  background: var(--accent);
  color: white;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid var(--accent);
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
}

.btn:hover {
  background: var(--accent-hover);
  color: white;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 6px 22px var(--accent-glow);
}

.btn.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn.btn-ghost:hover {
  background: var(--surface-hover);
  border-color: var(--accent);
  box-shadow: none;
}

.pill {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  background: rgba(108, 92, 231, 0.12);
  color: var(--accent);
  border: 1px solid rgba(108, 92, 231, 0.35);
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  margin-left: 0.4rem;
  vertical-align: middle;
  letter-spacing: 0.02em;
}

.crumbs {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
}

.crumbs a {
  color: var(--text-muted);
}

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.1rem;
  margin: 1.5rem 0;
}

@media (min-width: 720px) {
  .grid.grid-2 { grid-template-columns: 1fr 1fr; }
  .grid.grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid.grid-4 { grid-template-columns: repeat(4, 1fr); }
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem 1.35rem;
  transition: all 0.18s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.18s ease;
}

.card:hover {
  background: var(--surface-hover);
  border-color: rgba(108, 92, 231, 0.4);
  transform: translateY(-2px);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.35);
}

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

.card h3 {
  margin: 0 0 0.45rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.card p {
  color: var(--text-muted);
  margin-bottom: 0.85rem;
  font-size: 0.95rem;
}

.card .card-link {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--accent);
}

.agent-card h4 {
  margin: 0 0 0.3rem;
  font-size: 0.95rem;
  font-family: var(--font-mono);
  color: var(--text);
}

.agent-card .meta {
  font-size: 0.78rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.4rem;
}

.agent-card p {
  font-size: 0.88rem;
  margin: 0;
  color: var(--text-muted);
}

.phase {
  display: flex;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}

.phase:last-child {
  border-bottom: 0;
}

.phase-num {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(108, 92, 231, 0.12);
  color: var(--accent);
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
  border: 1px solid rgba(108, 92, 231, 0.3);
}

.phase-body h4 {
  margin: 0 0 0.3rem;
  font-size: 1rem;
}

.phase-body p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.92rem;
}

details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.9rem 1.15rem;
  margin: 1.2rem 0;
}

details[open] {
  padding-bottom: 1.15rem;
}

summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

summary::-webkit-details-marker { display: none; }

summary::before {
  content: "▸";
  color: var(--accent);
  display: inline-block;
  transition: transform 0.18s ease;
  font-size: 0.85rem;
}

details[open] summary::before {
  transform: rotate(90deg);
}

.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 4rem;
  padding: 2rem 1.25rem 2.5rem;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.88rem;
}

.site-footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.site-footer a {
  color: var(--text-muted);
}

.diagram {
  font-size: 0.74rem;
  line-height: 1.45;
  color: var(--text-muted);
}

.diagram .accent {
  color: var(--accent);
}

::selection {
  background: var(--accent-glow);
  color: var(--text);
}

@media (max-width: 480px) {
  .nav { gap: 0.85rem; font-size: 0.85rem; }
  main { padding: 1.5rem 1rem 3rem; }
  .hero { padding: 1.5rem 0 1rem; }
  pre { font-size: 0.78rem; padding: 0.85rem 0.95rem; }
}