/* ════════════════════════════════════════════
   OpenClaw Setup Guide — styles.css
   Theme: deep sea + lobster
   ════════════════════════════════════════════ */

:root {
  /* deep sea palette */
  --bg-0: #050d1a;
  --bg-1: #0a1628;
  --bg-2: #0d1b2a;
  --bg-3: #11253c;
  --bg-glass: rgba(17, 37, 60, 0.55);
  --bg-glass-strong: rgba(17, 37, 60, 0.85);

  /* lobster palette */
  --lobster-1: #ff6b3d;
  --lobster-2: #ff8a65;
  --lobster-3: #dc4a2a;
  --lobster-glow: rgba(255, 107, 61, 0.35);

  /* highlight cyan */
  --cyan-1: #00d9ff;
  --cyan-2: #4cc9f0;
  --cyan-glow: rgba(0, 217, 255, 0.3);

  /* terminal green */
  --green-1: #0fd882;
  --green-2: #00ff88;

  /* accent purple */
  --purple: #8b5cf6;

  /* text */
  --text-1: #f0f5fb;
  --text-2: #c5d2e2;
  --text-3: #8a9ab2;
  --text-4: #5a6a82;

  /* borders */
  --border-1: rgba(255, 255, 255, 0.06);
  --border-2: rgba(255, 255, 255, 0.1);
  --border-3: rgba(255, 255, 255, 0.18);

  /* radii */
  --r-sm: 6px;
  --r-md: 12px;
  --r-lg: 18px;
  --r-xl: 28px;

  /* shadows */
  --shadow-glow: 0 0 60px var(--lobster-glow);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-strong: 0 16px 48px rgba(0, 0, 0, 0.5);

  /* fonts */
  --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', 'Menlo', 'Consolas', monospace;
}

/* ════════════════════════════════════════════
   reset
   ════════════════════════════════════════════ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: var(--font-sans);
  background: var(--bg-0);
  color: var(--text-1);
  font-feature-settings: 'cv11', 'ss01', 'ss03';
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}
img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
a { color: var(--cyan-1); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--cyan-2); }
code { font-family: var(--font-mono); font-size: 0.92em; }
ul { padding-left: 1.4em; }
li { margin: 0.4em 0; color: var(--text-2); }

/* ════════════════════════════════════════════
   animated background
   ════════════════════════════════════════════ */

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -3;
  background:
    radial-gradient(ellipse at top, var(--bg-2) 0%, var(--bg-0) 60%),
    linear-gradient(transparent 95%, rgba(255, 107, 61, 0.04) 95%),
    linear-gradient(90deg, transparent 95%, rgba(0, 217, 255, 0.04) 95%);
  background-size: 100% 100%, 32px 32px, 32px 32px;
}

.bg-glow {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(circle at 15% 10%, var(--lobster-glow) 0%, transparent 35%),
    radial-gradient(circle at 85% 30%, var(--cyan-glow) 0%, transparent 40%),
    radial-gradient(circle at 50% 80%, rgba(139, 92, 246, 0.15) 0%, transparent 50%);
  filter: blur(60px);
  opacity: 0.7;
  animation: glow-shift 18s ease-in-out infinite alternate;
}

@keyframes glow-shift {
  0%   { transform: translate(0, 0) rotate(0deg); }
  50%  { transform: translate(-3%, 4%) rotate(2deg); }
  100% { transform: translate(2%, -2%) rotate(-2deg); }
}

.bg-bubbles {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.45;
}

/* ════════════════════════════════════════════
   nav
   ════════════════════════════════════════════ */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 14px 32px;
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  background: rgba(5, 13, 26, 0.7);
  border-bottom: 1px solid var(--border-1);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 18px;
  color: var(--text-1);
}
.nav-brand:hover { color: var(--text-1); }

.logo {
  font-size: 26px;
  filter: drop-shadow(0 0 10px var(--lobster-glow));
  animation: lobster-bob 3s ease-in-out infinite;
  display: inline-block;
}
@keyframes lobster-bob {
  0%, 100% { transform: translateY(0) rotate(0); }
  50%      { transform: translateY(-2px) rotate(-3deg); }
}

.brand-text-sub {
  color: var(--lobster-2);
  font-weight: 500;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 4px;
  margin-left: 20px;
  padding: 0;
}
.nav-links li { margin: 0; }
.nav-links a {
  display: block;
  padding: 8px 14px;
  color: var(--text-2);
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--r-sm);
  transition: all 0.2s;
}
.nav-links a:hover {
  color: var(--text-1);
  background: var(--border-1);
}

.nav-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang-toggle {
  padding: 6px 12px;
  border: 1px solid var(--border-2);
  border-radius: var(--r-sm);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-2);
  transition: all 0.2s;
  display: flex;
  gap: 2px;
}
.lang-toggle:hover {
  border-color: var(--lobster-1);
  color: var(--text-1);
}
.lang-sep { color: var(--text-4); margin: 0 1px; }
[data-lang="zh"] .lang-zh { color: var(--lobster-1); font-weight: 700; }
[data-lang="en"] .lang-en { color: var(--cyan-1); font-weight: 700; }

.github-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--r-sm);
  color: var(--text-2);
  transition: all 0.2s;
}
.github-link:hover {
  color: var(--text-1);
  background: var(--border-1);
}

.nav-toggle { display: none; }

/* ════════════════════════════════════════════
   hero
   ════════════════════════════════════════════ */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 60px;
  align-items: center;
  max-width: 1280px;
  margin: 0 auto;
  padding: 60px 32px 100px;
  position: relative;
}

.hero-inner { max-width: 720px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--bg-glass);
  border: 1px solid var(--border-2);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-2);
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}
.badge-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--green-1);
  box-shadow: 0 0 8px var(--green-1);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
  font-size: clamp(38px, 6vw, 72px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin-bottom: 24px;
}
.title-line { display: block; }
.gradient-text {
  background: linear-gradient(135deg, var(--lobster-1) 0%, var(--lobster-2) 50%, #ffd166 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 30px var(--lobster-glow));
}
.gradient-text-cyan {
  background: linear-gradient(135deg, var(--cyan-1) 0%, var(--cyan-2) 50%, #80ffea 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lobster-text {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: -0.01em;
  background: linear-gradient(135deg, var(--lobster-1), var(--lobster-3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 25px var(--lobster-glow));
}

.hero-sub {
  font-size: 17px;
  color: var(--text-2);
  margin-bottom: 32px;
  max-width: 600px;
}

/* install box */
.install-box {
  background: var(--bg-glass-strong);
  border: 1px solid var(--border-2);
  border-radius: var(--r-lg);
  overflow: hidden;
  backdrop-filter: blur(20px);
  margin-bottom: 32px;
  box-shadow: var(--shadow-card), 0 0 0 1px rgba(255, 107, 61, 0.05);
}

.install-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border-1);
  background: rgba(0, 0, 0, 0.2);
  padding: 0 8px;
  overflow-x: auto;
}
.install-tabs .tab {
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-3);
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
  white-space: nowrap;
}
.install-tabs .tab:hover { color: var(--text-1); }
.install-tabs .tab.active {
  color: var(--lobster-1);
  border-bottom-color: var(--lobster-1);
}

.install-cmd {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 20px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.5;
  position: relative;
  word-break: break-all;
}
.install-cmd[hidden] { display: none; }
.install-cmd .prompt {
  color: var(--lobster-1);
  font-weight: 700;
  flex-shrink: 0;
  user-select: none;
}
.install-cmd code {
  flex: 1;
  color: var(--text-1);
  font-size: 13.5px;
  background: none;
  padding: 0;
}
.install-cmd code .repo-owner { color: var(--lobster-2); font-style: italic; }

.copy-btn {
  flex-shrink: 0;
  width: 30px; height: 30px;
  border-radius: var(--r-sm);
  background: var(--border-1);
  color: var(--text-3);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: all 0.2s;
}
.copy-btn::before {
  content: "";
  width: 14px; height: 14px;
  border: 2px solid currentColor;
  border-radius: 3px;
  position: relative;
}
.copy-btn::after {
  content: "";
  position: absolute;
  width: 14px; height: 14px;
  border: 2px solid currentColor;
  border-radius: 3px;
  top: 5px; left: 9px;
  background: var(--bg-glass-strong);
}
.copy-btn:hover { color: var(--lobster-1); background: rgba(255, 107, 61, 0.12); }
.copy-btn.copied { color: var(--green-1); background: rgba(15, 216, 130, 0.12); }
.copy-btn.copied::before, .copy-btn.copied::after { display: none; }
.copy-btn.copied::after {
  display: block;
  content: "✓";
  position: static;
  width: auto; height: auto;
  border: none;
  background: none;
  font-size: 16px;
  font-weight: 700;
}

.install-hint {
  padding: 10px 20px;
  background: rgba(255, 107, 61, 0.04);
  border-top: 1px solid var(--border-1);
  font-size: 12.5px;
  color: var(--text-3);
}

.hero-cta {
  display: flex;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--r-md);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: all 0.2s;
  cursor: pointer;
}
.btn-primary {
  background: linear-gradient(135deg, var(--lobster-1), var(--lobster-3));
  color: white;
  box-shadow: 0 4px 20px var(--lobster-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--lobster-glow);
  color: white;
}
.btn-ghost {
  background: var(--bg-glass);
  color: var(--text-1);
  border: 1px solid var(--border-2);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover {
  background: var(--border-1);
  border-color: var(--border-3);
  color: var(--text-1);
}

/* hero stats */
.hero-stats {
  display: flex;
  align-items: center;
  gap: 0;
  flex-wrap: wrap;
}
.stat {
  display: flex;
  flex-direction: column;
  padding-right: 28px;
}
.stat-num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--text-1);
  line-height: 1;
  background: linear-gradient(135deg, var(--cyan-1), var(--purple));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat-unit { font-size: 16px; color: var(--text-3); margin-left: 2px; -webkit-text-fill-color: var(--text-3); }
.stat-label {
  font-size: 12px;
  color: var(--text-3);
  margin-top: 4px;
  letter-spacing: 0.02em;
}
.stat-sep {
  width: 1px;
  height: 32px;
  background: var(--border-2);
  margin-right: 28px;
}

/* terminal mockup */
.terminal-mockup {
  background: linear-gradient(180deg, #0a0f1a 0%, #050810 100%);
  border-radius: var(--r-lg);
  border: 1px solid var(--border-2);
  overflow: hidden;
  box-shadow: var(--shadow-strong), 0 0 50px rgba(0, 217, 255, 0.1);
  font-family: var(--font-mono);
  font-size: 13px;
  position: relative;
}
.terminal-mockup::before {
  content: "";
  position: absolute;
  inset: -1px;
  background: linear-gradient(135deg, transparent 30%, rgba(0, 217, 255, 0.4) 50%, transparent 70%);
  border-radius: var(--r-lg);
  z-index: -1;
  opacity: 0.5;
  animation: border-shine 6s linear infinite;
}
@keyframes border-shine {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}
.terminal-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--border-1);
}
.terminal-header .dot {
  width: 12px; height: 12px;
  border-radius: 50%;
}
.dot-r { background: #ff5f56; }
.dot-y { background: #ffbd2e; }
.dot-g { background: #27c93f; }
.terminal-title {
  margin-left: 12px;
  font-size: 12px;
  color: var(--text-3);
}
.terminal-body {
  padding: 18px 16px;
  min-height: 320px;
  color: var(--text-2);
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-all;
}
.term-prompt { color: var(--lobster-1); }
.term-cmd    { color: var(--text-1); }
.term-out    { color: var(--text-3); }
.term-ok     { color: var(--green-1); }
.term-warn   { color: #ffd166; }
.term-cursor {
  display: inline-block;
  width: 8px;
  background: var(--green-1);
  margin-left: 2px;
  animation: blink 1s infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ════════════════════════════════════════════
   common section
   ════════════════════════════════════════════ */

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 32px;
}
.container-wide {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px;
}

section { padding: 100px 0; position: relative; }

.section-eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--cyan-1);
  margin-bottom: 16px;
  padding: 4px 10px;
  background: rgba(0, 217, 255, 0.06);
  border: 1px solid rgba(0, 217, 255, 0.2);
  border-radius: var(--r-sm);
}
.section-title {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 16px;
}
.section-lead {
  font-size: 16px;
  color: var(--text-2);
  margin-bottom: 48px;
  max-width: 720px;
}

/* ════════════════════════════════════════════
   dual section
   ════════════════════════════════════════════ */

.dual-section { padding: 80px 0 100px; }

.dual-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-top: 56px;
}

.dual-card {
  position: relative;
  background: var(--bg-glass);
  border: 1px solid var(--border-2);
  border-radius: var(--r-lg);
  padding: 32px;
  backdrop-filter: blur(20px);
  transition: all 0.3s;
  overflow: hidden;
}
.dual-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, currentColor, transparent);
  opacity: 0.6;
}
.dual-human { color: var(--lobster-1); }
.dual-agent { color: var(--cyan-1); }
.dual-card:hover {
  transform: translateY(-4px);
  border-color: currentColor;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4), 0 0 30px var(--border-1);
}

.dual-icon {
  font-size: 36px;
  margin-bottom: 16px;
  filter: drop-shadow(0 0 10px currentColor);
}
.dual-card h3 {
  color: var(--text-1);
  font-size: 22px;
  margin-bottom: 16px;
  font-weight: 700;
}
.dual-card ul { padding-left: 1.2em; }
.dual-card li {
  color: var(--text-2);
  font-size: 14.5px;
}
.dual-card code {
  background: rgba(0, 0, 0, 0.4);
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 0.85em;
  color: currentColor;
}

/* ════════════════════════════════════════════
   architecture diagram
   ════════════════════════════════════════════ */

.how-section { padding: 80px 0 100px; }

.arch-diagram {
  margin-top: 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
.arch-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  width: 100%;
}
.arch-arrow {
  font-size: 22px;
  color: var(--text-4);
  animation: arrow-pulse 2s ease-in-out infinite;
}
@keyframes arrow-pulse {
  0%, 100% { transform: translateY(0); opacity: 0.5; }
  50%      { transform: translateY(3px); opacity: 1; }
}
.arch-pill {
  padding: 8px 14px;
  background: var(--bg-glass);
  border: 1px solid var(--border-2);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-2);
  transition: all 0.2s;
  white-space: nowrap;
}
.arch-pill:hover {
  border-color: var(--cyan-1);
  color: var(--text-1);
  transform: translateY(-2px);
}
.arch-model:hover {
  border-color: var(--lobster-1);
}
.arch-gateway, .arch-agent {
  background: linear-gradient(135deg, var(--bg-glass-strong), var(--bg-glass));
  border: 1px solid var(--cyan-1);
  border-radius: var(--r-lg);
  padding: 18px 28px;
  min-width: 280px;
  text-align: center;
  position: relative;
  box-shadow: 0 0 30px rgba(0, 217, 255, 0.15);
}
.arch-agent {
  border-color: var(--purple);
  box-shadow: 0 0 30px rgba(139, 92, 246, 0.15);
}
.arch-agent-ghost {
  border-style: dashed;
  opacity: 0.55;
  box-shadow: none;
}
.arch-node-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-1);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}
.arch-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  padding: 2px 6px;
  background: rgba(0, 217, 255, 0.15);
  color: var(--cyan-1);
  border-radius: 3px;
  letter-spacing: 0.05em;
}
.arch-node-sub {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-3);
  margin-top: 4px;
}
.arch-node-desc {
  font-size: 13px;
  color: var(--text-2);
  margin-top: 8px;
}
.arch-row.arch-agents { gap: 16px; }

/* ════════════════════════════════════════════
   tutorial
   ════════════════════════════════════════════ */

.tutorial-section {
  padding: 80px 0 100px;
  background: linear-gradient(180deg, transparent, rgba(255, 107, 61, 0.02), transparent);
}

.tutorial-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 48px;
  margin-top: 48px;
}

.tutorial-toc {
  position: sticky;
  top: 90px;
  align-self: start;
  background: var(--bg-glass);
  border: 1px solid var(--border-2);
  border-radius: var(--r-md);
  padding: 18px 16px;
  backdrop-filter: blur(12px);
}
.toc-header {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--cyan-1);
  margin-bottom: 12px;
  padding-left: 6px;
}
.toc-list {
  list-style: none;
  padding: 0;
  counter-reset: toc;
}
.toc-list li {
  counter-increment: toc;
  margin: 0;
}
.toc-list a {
  display: block;
  padding: 7px 10px 7px 28px;
  font-size: 13px;
  color: var(--text-3);
  border-left: 2px solid transparent;
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  position: relative;
  transition: all 0.2s;
}
.toc-list a::before {
  content: counter(toc);
  position: absolute;
  left: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--text-4);
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 3px;
  background: var(--border-1);
}
.toc-list a:hover {
  color: var(--text-1);
  background: var(--border-1);
}
.toc-list a.active {
  color: var(--lobster-1);
  border-left-color: var(--lobster-1);
  background: rgba(255, 107, 61, 0.08);
}
.toc-list a.active::before {
  background: var(--lobster-1);
  color: var(--bg-0);
}

.tutorial-content {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.step {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 24px;
  padding: 28px;
  background: var(--bg-glass);
  border: 1px solid var(--border-2);
  border-radius: var(--r-lg);
  backdrop-filter: blur(8px);
  position: relative;
  transition: all 0.3s;
}
.step:hover {
  border-color: var(--border-3);
  box-shadow: var(--shadow-card);
}
.step-num {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--lobster-1), var(--lobster-3));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 800;
  color: white;
  box-shadow: 0 6px 20px var(--lobster-glow);
}
.step-body h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.step-body p {
  color: var(--text-2);
  margin-bottom: 14px;
  font-size: 15px;
}
.step-body ul { color: var(--text-2); }
.step-body code {
  background: rgba(0, 0, 0, 0.4);
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 0.88em;
  color: var(--cyan-2);
}

/* code blocks */
pre {
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid var(--border-1);
  border-radius: var(--r-md);
  padding: 16px 20px;
  overflow-x: auto;
  position: relative;
  margin: 14px 0;
}
pre code {
  background: none;
  padding: 0;
  color: var(--text-1);
  font-size: 13.5px;
  line-height: 1.65;
  font-family: var(--font-mono);
}
pre::after {
  content: "";
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: 50px;
  background: linear-gradient(90deg, transparent, rgba(0, 0, 0, 0.5));
  pointer-events: none;
  border-radius: 0 var(--r-md) var(--r-md) 0;
}

/* injected copy button on pre */
.pre-wrap {
  position: relative;
}
.pre-copy {
  position: absolute;
  top: 8px;
  right: 8px;
  z-index: 2;
  width: 32px;
  height: 32px;
  border-radius: var(--r-sm);
  background: rgba(0, 0, 0, 0.6);
  color: var(--text-3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 11px;
  opacity: 0;
  transition: all 0.2s;
  border: 1px solid var(--border-2);
}
.pre-wrap:hover .pre-copy {
  opacity: 1;
}
.pre-copy:hover {
  color: var(--lobster-1);
  border-color: var(--lobster-1);
  background: rgba(255, 107, 61, 0.1);
}
.pre-copy.copied {
  color: var(--green-1);
  border-color: var(--green-1);
  opacity: 1;
}

.callout {
  display: flex;
  gap: 12px;
  padding: 14px 18px;
  border-radius: var(--r-md);
  margin: 14px 0;
  font-size: 14px;
  line-height: 1.6;
  border-left: 3px solid;
}
.callout-info { background: rgba(0, 217, 255, 0.06); border-color: var(--cyan-1); color: var(--text-2); }
.callout-warn { background: rgba(255, 209, 102, 0.07); border-color: #ffd166; color: var(--text-2); }
.callout strong { color: var(--text-1); }

/* provider tabs (inside step) */
.provider-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin: 18px 0 0;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-1);
}
.provider-tabs .ptab {
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-3);
  border-radius: var(--r-sm);
  border: 1px solid transparent;
  transition: all 0.2s;
}
.provider-tabs .ptab:hover { color: var(--text-1); }
.provider-tabs .ptab.active {
  color: var(--lobster-1);
  border-color: var(--lobster-1);
  background: rgba(255, 107, 61, 0.08);
}
.ptab-panel { padding-top: 12px; }
.ptab-panel[hidden] { display: none; }

/* ════════════════════════════════════════════
   reference tables
   ════════════════════════════════════════════ */

.ref-section { padding: 80px 0; }
.ref-section-alt {
  background: linear-gradient(180deg, transparent, rgba(0, 217, 255, 0.025), transparent);
}

.table-wrap {
  margin: 48px 0;
  overflow-x: auto;
  background: var(--bg-glass);
  border: 1px solid var(--border-2);
  border-radius: var(--r-lg);
  backdrop-filter: blur(8px);
}
.ref-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  min-width: 720px;
}
.ref-table th {
  text-align: left;
  padding: 14px 18px;
  font-weight: 600;
  color: var(--cyan-1);
  border-bottom: 1px solid var(--border-2);
  font-size: 13px;
  letter-spacing: 0.02em;
  background: rgba(0, 0, 0, 0.2);
  white-space: nowrap;
}
.ref-table td {
  padding: 12px 18px;
  border-bottom: 1px solid var(--border-1);
  color: var(--text-2);
}
.ref-table tr:last-child td { border-bottom: none; }
.ref-table tr:hover td { background: rgba(255, 255, 255, 0.02); }
.ref-table code {
  background: rgba(0, 0, 0, 0.4);
  padding: 2px 6px;
  border-radius: 3px;
  color: var(--cyan-2);
  font-size: 12.5px;
}

/* ollama recommendations */
.ollama-rec { margin-top: 56px; }
.ollama-rec h3 {
  font-size: 22px;
  margin-bottom: 20px;
  color: var(--text-1);
}
.ram-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}
.ram-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-2);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: all 0.3s;
}
.ram-card:hover {
  transform: translateY(-3px);
  border-color: var(--lobster-1);
}
.ram-card-rec {
  border-color: var(--lobster-1);
  box-shadow: 0 0 30px rgba(255, 107, 61, 0.15);
}
.ram-card-head {
  padding: 14px 18px;
  background: rgba(0, 0, 0, 0.25);
  border-bottom: 1px solid var(--border-1);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.ram-tag {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: 0.02em;
}
.ram-rec-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  background: var(--lobster-1);
  color: white;
  border-radius: 999px;
  letter-spacing: 0.05em;
}
.ram-card-body {
  padding: 16px 18px;
  font-family: var(--font-mono);
  font-size: 13.5px;
}
.ram-card-body code {
  background: none;
  color: var(--cyan-2);
  padding: 0;
}
.ram-card-meta {
  margin-top: 8px;
  font-size: 12px;
  color: var(--text-3);
  font-family: var(--font-sans);
}

/* ════════════════════════════════════════════
   channel grid
   ════════════════════════════════════════════ */

.channel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 18px;
  margin-top: 48px;
}
.channel-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-2);
  border-radius: var(--r-lg);
  padding: 22px;
  backdrop-filter: blur(12px);
  transition: all 0.3s;
}
.channel-card:hover {
  transform: translateY(-3px);
  border-color: var(--cyan-1);
  box-shadow: var(--shadow-card);
}
.channel-card-warn {
  border-color: rgba(255, 209, 102, 0.4);
}
.channel-card-warn:hover {
  border-color: #ffd166;
}
.channel-card-more {
  background: linear-gradient(135deg, var(--bg-glass), rgba(139, 92, 246, 0.08));
  border-color: rgba(139, 92, 246, 0.3);
}
.channel-card-more:hover { border-color: var(--purple); }
.channel-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.channel-icon {
  font-size: 24px;
}
.channel-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-1);
  flex: 1;
}
.channel-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 999px;
  letter-spacing: 0.02em;
}
.channel-badge-zero { background: rgba(15, 216, 130, 0.15); color: var(--green-1); }
.channel-badge-easy { background: rgba(0, 217, 255, 0.12); color: var(--cyan-1); }
.channel-badge-mid  { background: rgba(255, 107, 61, 0.12); color: var(--lobster-1); }
.channel-badge-warn { background: rgba(255, 209, 102, 0.12); color: #ffd166; }
.channel-card p {
  font-size: 13.5px;
  color: var(--text-2);
  margin-bottom: 12px;
  line-height: 1.55;
}
.channel-card pre { margin: 10px 0 0; padding: 12px 14px; }
.channel-card pre code { font-size: 12px; }

/* ════════════════════════════════════════════
   troubleshooting
   ════════════════════════════════════════════ */

.trouble-section { padding: 80px 0; }
.trouble-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 16px;
  margin-top: 48px;
}
.trouble-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-2);
  border-radius: var(--r-md);
  padding: 18px;
  transition: all 0.3s;
}
.trouble-card:hover {
  border-color: var(--lobster-1);
  background: rgba(255, 107, 61, 0.04);
}
.trouble-err {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: #ff6b3d;
  background: rgba(220, 74, 42, 0.1);
  padding: 8px 12px;
  border-radius: var(--r-sm);
  margin-bottom: 10px;
  border-left: 3px solid #ff6b3d;
  word-break: break-word;
}
.trouble-err code { background: none; color: inherit; padding: 0; }
.trouble-fix {
  font-size: 13.5px;
  color: var(--text-2);
  line-height: 1.6;
}
.trouble-fix code {
  background: rgba(0, 0, 0, 0.4);
  padding: 1px 6px;
  border-radius: 3px;
  color: var(--cyan-2);
  font-size: 0.88em;
}

/* ════════════════════════════════════════════
   for agents
   ════════════════════════════════════════════ */

.agents-section {
  padding: 80px 0 100px;
  background: linear-gradient(180deg, transparent, rgba(0, 217, 255, 0.04), transparent);
}

.agent-flow {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 48px 0;
}
.agent-step {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 18px;
  padding: 20px 24px;
  background: var(--bg-glass);
  border: 1px solid var(--border-2);
  border-radius: var(--r-md);
  backdrop-filter: blur(8px);
  transition: all 0.2s;
}
.agent-step:hover {
  border-color: var(--cyan-1);
  background: rgba(0, 217, 255, 0.04);
}
.agent-step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--cyan-1), var(--cyan-2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 20px;
  color: var(--bg-0);
  box-shadow: 0 4px 16px var(--cyan-glow);
}
.agent-step h4 {
  color: var(--text-1);
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 4px;
}
.agent-step p { color: var(--text-2); font-size: 14px; }
.agent-step pre { margin: 10px 0 0; padding: 12px 16px; font-size: 12.5px; }
.agent-step code {
  background: rgba(0, 0, 0, 0.4);
  padding: 1px 6px;
  border-radius: 3px;
  color: var(--cyan-2);
  font-size: 0.9em;
}

.agent-files {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
  margin-top: 24px;
}
.agent-file {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  background: var(--bg-glass-strong);
  border: 1px solid var(--border-2);
  border-radius: var(--r-md);
  color: var(--text-1);
  transition: all 0.2s;
  text-decoration: none;
}
.agent-file:hover {
  transform: translateY(-2px);
  border-color: var(--cyan-1);
  color: var(--text-1);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3), 0 0 30px var(--cyan-glow);
}
.agent-file-icon { font-size: 28px; }
.agent-file-name {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  color: var(--text-1);
}
.agent-file-desc {
  font-size: 12.5px;
  color: var(--text-3);
  margin-top: 2px;
}

/* ════════════════════════════════════════════
   footer
   ════════════════════════════════════════════ */

.footer {
  padding: 60px 0 32px;
  border-top: 1px solid var(--border-1);
  background: rgba(0, 0, 0, 0.4);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 40px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 18px;
  font-weight: 800;
  color: var(--text-1);
  margin-bottom: 12px;
}
.footer-tag {
  color: var(--text-3);
  font-size: 13.5px;
  max-width: 320px;
}
.footer h4 {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}
.footer ul {
  list-style: none;
  padding: 0;
}
.footer li { margin: 6px 0; }
.footer a { color: var(--text-3); font-size: 13.5px; }
.footer a:hover { color: var(--cyan-1); }
.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-1);
  font-size: 13px;
  color: var(--text-4);
  text-align: center;
}

/* ════════════════════════════════════════════
   back to top
   ════════════════════════════════════════════ */

.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--lobster-1), var(--lobster-3));
  color: white;
  font-size: 20px;
  font-weight: 700;
  box-shadow: 0 4px 20px var(--lobster-glow);
  opacity: 0;
  pointer-events: none;
  transform: translateY(20px);
  transition: all 0.3s;
  z-index: 50;
}
.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px var(--lobster-glow);
}

/* ════════════════════════════════════════════
   reveal-on-scroll animation
   ════════════════════════════════════════════ */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ════════════════════════════════════════════
   responsive
   ════════════════════════════════════════════ */

@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 48px;
    padding: 40px 24px 80px;
  }
  .terminal-mockup { max-width: 600px; margin: 0 auto; }
  .tutorial-layout { grid-template-columns: 1fr; gap: 24px; }
  .tutorial-toc { position: relative; top: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav { padding: 12px 16px; gap: 12px; }
  .nav-links { display: none; }
  .nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    width: 36px; height: 36px;
    align-items: center;
    justify-content: center;
    margin-left: auto;
    border-radius: var(--r-sm);
  }
  .nav-toggle span {
    width: 18px;
    height: 2px;
    background: var(--text-1);
    transition: all 0.2s;
  }
  .nav.menu-open .nav-links {
    display: flex;
    position: fixed;
    top: 60px; left: 0; right: 0;
    flex-direction: column;
    background: var(--bg-glass-strong);
    backdrop-filter: blur(20px);
    padding: 16px;
    gap: 4px;
    border-bottom: 1px solid var(--border-2);
    z-index: 99;
  }
  .nav.menu-open .nav-links a { display: block; padding: 12px 16px; }

  .container, .container-wide { padding: 0 20px; }
  section { padding: 64px 0; }
  .hero-title { font-size: 36px; }
  .section-title { font-size: 28px; }
  .dual-grid { grid-template-columns: 1fr; }
  .step { grid-template-columns: 1fr; padding: 22px; }
  .step-num { width: 44px; height: 44px; font-size: 18px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero-stats { gap: 14px 0; }
  .stat { padding-right: 16px; }
  .stat-sep { margin-right: 16px; }
  .install-cmd { font-size: 11.5px; padding: 14px 14px; }
  .install-cmd code { font-size: 11.5px; word-break: break-all; }
  .terminal-body { font-size: 11.5px; min-height: 240px; padding: 14px; }
}

/* ════════════════════════════════════════════
   selection + scrollbar
   ════════════════════════════════════════════ */

::selection {
  background: var(--lobster-1);
  color: white;
}

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-1); }
::-webkit-scrollbar-thumb {
  background: var(--bg-3);
  border-radius: 6px;
  border: 2px solid var(--bg-1);
}
::-webkit-scrollbar-thumb:hover { background: var(--lobster-1); }

/* ════════════════════════════════════════════
   reduced motion
   ════════════════════════════════════════════ */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}