:root {
  --bg: #020713;
  --bg-deep: #000c22;
  --bg-surface: #001333;
  --bg-panel: rgba(5, 43, 112, 0.45);
  --border: #0c3b8a;
  --border-light: rgba(0, 207, 255, 0.25);
  --text: #eaf2ff;
  --muted: #9db3d6;
  --accent: #00cfff;
  --accent-text: #020713;
  --driver: #ff4b18;
  --driver-soft: #ffb14a;
  --peer: #00cfff;
  --peer-soft: #00eaff;
  --opencode: #22c55e;
  --opencode-soft: #4ade80;
  --qwen: #a855f7;
  --qwen-soft: #c084fc;
  --resident: #00cfff;
  --invocation: #ffb14a;
  --setup: #22c55e;
  --bar-track: #05224e;
  --code-bg: #030d22;
  --card-bg: rgba(2, 19, 51, 0.85);
  --warn-bg: rgba(255, 177, 74, 0.15);
  --warn-text: #ffb14a;
  --focus: #00cfff;
  --shadow-cyber: 0 8px 32px rgba(0, 0, 0, 0.6);
  --glow-cyan: 0 0 20px rgba(0, 207, 255, 0.3);
  --glow-orange: 0 0 20px rgba(255, 75, 24, 0.3);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #f8fafc;
  --bg-deep: #eef2f6;
  --bg-surface: #ffffff;
  --bg-panel: #ffffff;
  --border: #cbd5e1;
  --border-light: #e2e8f0;
  --text: #0f172a;
  --muted: #475569;
  --accent: #0284c7;
  --accent-text: #ffffff;
  --driver: #ea580c;
  --driver-soft: #c2410c;
  --peer: #0284c7;
  --peer-soft: #0369a1;
  --opencode: #16a34a;
  --opencode-soft: #15803d;
  --qwen: #9333ea;
  --qwen-soft: #7e22ce;
  --resident: #0284c7;
  --invocation: #d97706;
  --setup: #16a34a;
  --bar-track: #e2e8f0;
  --code-bg: #f1f5f9;
  --card-bg: #ffffff;
  --warn-bg: #fef3c7;
  --warn-text: #92400e;
  --focus: #0284c7;
  --shadow-cyber: 0 4px 16px rgba(15, 23, 42, 0.08);
  --glow-cyan: none;
  --glow-orange: none;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  overflow-wrap: anywhere;
  min-height: 100vh;
}

.wrap {
  max-width: 76rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

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

a:hover {
  text-decoration: underline;
}

code, pre {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.85rem;
}

pre {
  margin: 0;
  padding: 0.6rem 0.85rem;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow-x: auto;
}

/* Focus styles */
:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

/* Sticky Navigation */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
  gap: 1.5rem;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text);
  text-decoration: none !important;
}

.nav-logo {
  width: 2rem;
  height: 2rem;
  flex-shrink: 0;
}

.nav-links {
  display: none;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

@media (min-width: 56rem) {
  .nav-links {
    display: flex;
  }
}

.nav-links a {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 500;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-cta {
  background: linear-gradient(135deg, var(--driver), var(--peer));
  color: #ffffff !important;
  font-weight: 600;
  padding: 0.45rem 1rem;
  border-radius: 999px;
  font-size: 0.88rem;
  text-decoration: none !important;
  box-shadow: 0 0 12px rgba(0, 207, 255, 0.3);
  transition: opacity 0.2s ease, transform 0.15s ease;
}

.nav-cta:hover {
  opacity: 0.92;
  transform: translateY(-1px);
}

/* Button & Controls */
.btn {
  font: inherit;
  font-size: 0.88rem;
  color: var(--text);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.9rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  transition: all 0.15s ease;
}

.btn:hover {
  border-color: var(--accent);
  background: var(--bg-panel);
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
  border-color: var(--accent);
}

.btn-primary:hover {
  opacity: 0.9;
  background: var(--accent);
}

/* Hero Section */
.hero {
  padding: 3.5rem 0 2.5rem;
  text-align: center;
  position: relative;
  background: radial-gradient(circle at 50% 15%, rgba(0, 207, 255, 0.08) 0%, transparent 65%);
}

.hero-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(0, 207, 255, 0.1);
  border: 1px solid rgba(0, 207, 255, 0.3);
  padding: 0.3rem 0.9rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.15;
  margin: 0 auto 1.25rem;
  max-width: 50rem;
  background: linear-gradient(135deg, #ffffff 40%, var(--accent) 85%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

:root[data-theme="light"] .hero h1 {
  background: linear-gradient(135deg, #0f172a 40%, #0284c7 85%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--muted);
  max-width: 44rem;
  margin: 0 auto 2rem;
  line-height: 1.6;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 2.5rem;
}

.hero-ctas .btn {
  padding: 0.65rem 1.4rem;
  font-size: 0.98rem;
  border-radius: 999px;
}

/* Workflow Stage Chips */
.flow-container {
  margin: 2.5rem auto 1rem;
  max-width: 66rem;
}

.flow-title {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--muted);
  margin-bottom: 0.75rem;
  text-align: center;
}

.flow-chips {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.5rem 0.75rem;
}

.flow-chip {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.4rem 0.9rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
  transition: all 0.2s ease;
}

.flow-chip:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.flow-chip .chip-num {
  font-size: 0.75rem;
  color: var(--accent);
  background: rgba(0, 207, 255, 0.12);
  padding: 0.1rem 0.45rem;
  border-radius: 999px;
}

.flow-arrow {
  color: var(--muted);
  font-weight: bold;
  opacity: 0.6;
  user-select: none;
}

/* Dual-Agent Terminal Demo */
.demo-section {
  padding: 2rem 0 3.5rem;
}

.terminal-window {
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-cyber), 0 0 24px rgba(0, 207, 255, 0.12);
  overflow: hidden;
}

.terminal-header {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.dots {
  display: flex;
  gap: 0.45rem;
}

.dot {
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
}

.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; }

.terminal-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
  font-family: ui-monospace, monospace;
}

.terminal-panes {
  display: grid;
  grid-template-columns: 1fr;
  divide-y: 1px solid var(--border);
}

@media (min-width: 52rem) {
  .terminal-panes {
    grid-template-columns: 1fr 1fr;
    divide-y: 0;
  }
}

.terminal-pane {
  padding: 1.25rem;
  background: var(--bg-deep);
  display: flex;
  flex-direction: column;
}

.terminal-pane:first-child {
  border-bottom: 1px solid var(--border);
}

@media (min-width: 52rem) {
  .terminal-pane:first-child {
    border-bottom: 0;
    border-right: 1px solid var(--border);
  }
}

.pane-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  margin-bottom: 0.85rem;
  width: fit-content;
}

.badge-claude {
  background: rgba(255, 75, 24, 0.15);
  color: var(--driver);
  border: 1px solid rgba(255, 75, 24, 0.35);
}

.badge-peer {
  background: rgba(0, 207, 255, 0.15);
  color: var(--peer);
  border: 1px solid rgba(0, 207, 255, 0.35);
}

.pane-code {
  font-size: 0.83rem;
  line-height: 1.65;
  color: var(--text);
}

.term-line {
  margin-bottom: 0.3rem;
}

.term-prompt {
  color: var(--muted);
  user-select: none;
}

.term-cmd {
  color: #ffffff;
  font-weight: 600;
}

:root[data-theme="light"] .term-cmd {
  color: #0f172a;
}

.term-dim {
  color: var(--muted);
}

.term-highlight {
  color: var(--accent);
}

.term-success {
  color: var(--opencode);
  font-weight: 600;
}

.term-tag {
  background: rgba(34, 197, 94, 0.15);
  color: var(--opencode);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-size: 0.76rem;
  font-weight: 600;
}

/* Value Props Grid */
.values-section {
  padding: 2.5rem 0;
}

.section-head {
  text-align: center;
  margin-bottom: 2rem;
}

.section-head h2 {
  font-size: 1.85rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
}

.section-head p {
  color: var(--muted);
  max-width: 36rem;
  margin: 0 auto;
}

.values-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 52rem) {
  .values-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.value-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.value-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
}

.value-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 0.65rem;
  color: var(--text);
}

.value-card p {
  color: var(--muted);
  font-size: 0.92rem;
  margin: 0;
  line-height: 1.55;
}

/* How It Works Section */
.how-section {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
}

.how-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 52rem) {
  .how-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.how-step {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.step-num {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.how-step h4 {
  font-size: 1.05rem;
  margin: 0 0 0.5rem;
}

.how-step p {
  font-size: 0.88rem;
  color: var(--muted);
  margin: 0;
}

/* Interactive Catalog Section */
.catalog-section {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
}

.catalog-controls {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

@media (min-width: 48rem) {
  .catalog-controls {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.search-wrap {
  flex: 1 1 auto;
  max-width: 28rem;
  position: relative;
}

.search-input {
  width: 100%;
  font: inherit;
  font-size: 0.92rem;
  background: var(--bg-surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.55rem 1.15rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 207, 255, 0.25);
  outline: none;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip {
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.35rem 0.9rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.chip:hover {
  color: var(--text);
  border-color: var(--accent);
}

.chip[aria-pressed="true"] {
  background: var(--accent);
  color: var(--accent-text);
  border-color: var(--accent);
  box-shadow: 0 0 10px rgba(0, 207, 255, 0.35);
}

/* Catalog Card Grid */
.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 44rem) {
  .grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 68rem) {
  .grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  min-width: 0;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  border-color: var(--border-light);
  transform: translateY(-2px);
}

.card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
}

:root[data-theme="light"] .card h3 {
  color: #0f172a;
}

/* Tabs inside Cards */
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.85rem;
}

.tab {
  font: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  color: var(--muted);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all 0.15s ease;
}

.tab:hover:not([aria-disabled="true"]) {
  color: var(--text);
  border-color: var(--accent);
}

.tab[aria-selected="true"] {
  background: var(--accent);
  color: var(--accent-text);
  border-color: var(--accent);
}

.tab[aria-disabled="true"] {
  opacity: 0.4;
  cursor: not-allowed;
  border-style: dashed;
  background: transparent;
}

.panel-body {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
}

.meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 0.65rem;
}

.version {
  background: rgba(0, 207, 255, 0.12);
  color: var(--accent);
  padding: 0.1rem 0.45rem;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.78rem;
}

.desc {
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0 0 1rem;
  line-height: 1.5;
  flex-grow: 1;
}

/* Install Row */
.install {
  margin-top: 0.75rem;
}

.install-label, .install-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.cmd-row {
  display: flex;
  gap: 0.5rem;
  align-items: stretch;
}

.cmd-row pre {
  flex: 1 1 auto;
  min-width: 0;
  margin: 0;
  padding: 0.5rem 0.75rem;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  overflow-x: auto;
  white-space: pre;
}

.btn.copy {
  padding: 0.4rem 0.75rem;
  font-size: 0.82rem;
  font-weight: 600;
  flex-shrink: 0;
}

/* Footprints & Meters */
.footprint {
  margin-top: 1.15rem;
  border-top: 1px solid var(--border);
  padding-top: 0.85rem;
}

.fig {
  margin-bottom: 0.65rem;
}

.fig-head {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  margin-bottom: 0.2rem;
}

.fig-label {
  font-weight: 600;
}

.fig-resident .fig-label { color: var(--resident); }
.fig-invocation .fig-label { color: var(--invocation); }
.fig-setup .fig-label { color: var(--setup); }

.bar {
  height: 6px;
  background: var(--bar-track);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 0.2rem;
}

.bar-fill {
  height: 100%;
  width: 0;
  border-radius: 3px;
  transition: width 0.3s ease;
}

.fig-resident .bar-fill { background: var(--resident); }
.fig-setup .bar-fill { background: var(--setup); }

.badge {
  display: inline-block;
  background: var(--warn-bg);
  color: var(--warn-text);
  border-radius: 4px;
  padding: 0.15rem 0.5rem;
  font-size: 0.76rem;
  font-weight: 600;
}

.note, .empty {
  font-size: 0.78rem;
  color: var(--muted);
  margin: 0.5rem 0 0;
  line-height: 1.4;
}

.error {
  color: var(--warn-text);
  background: var(--warn-bg);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
}

/* Install Headline Section */
.install-section {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
}

.install-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

@media (min-width: 50rem) {
  .install-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.install-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.install-card h4 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.install-card p {
  color: var(--muted);
  font-size: 0.86rem;
  margin: 0 0 0.75rem;
}

/* Footprint Explainer */
.why {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
}

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

@media (min-width: 48rem) {
  .why dl {
    grid-template-columns: repeat(3, 1fr);
  }
}

.why dt {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  margin-bottom: 0.35rem;
}

.why dd {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.55;
}

/* Footer */
footer.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-deep);
  padding: 3rem 0 2rem;
  margin-top: 2rem;
}

.footer-top {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

@media (min-width: 48rem) {
  .footer-top {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.75rem;
}

.footer-nav a {
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-nav a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid rgba(12, 59, 138, 0.4);
  padding-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--muted);
}

/* Visually hidden utility */
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}