precursor 0.2.3

:root {
  --bg-0: #070b12;
  --bg-1: #0d1724;
  --bg-2: #16283c;
  --surface-0: rgba(13, 23, 36, 0.82);
  --surface-1: rgba(18, 31, 48, 0.9);
  --surface-2: rgba(25, 42, 64, 0.94);
  --line: rgba(159, 195, 232, 0.24);
  --line-strong: rgba(159, 195, 232, 0.4);
  --text: #f1f6ff;
  --muted: #acc0d8;
  --accent: #3de0c1;
  --accent-2: #ff8b3d;
  --danger: #ff6f6f;
  --shadow: 0 24px 64px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Sora", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 12% 5%, #173b57 0, transparent 36%),
    radial-gradient(circle at 86% 0, #2e223d 0, transparent 42%),
    linear-gradient(160deg, var(--bg-0), var(--bg-1) 45%, #0a111d 100%);
  line-height: 1.55;
}

.ambient {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 25% 72%, rgba(61, 224, 193, 0.12) 0, transparent 38%),
    radial-gradient(circle at 86% 34%, rgba(255, 139, 61, 0.14) 0, transparent 30%),
    radial-gradient(circle at 52% 12%, rgba(80, 156, 255, 0.08) 0, transparent 42%);
}

.topbar {
  width: min(1160px, 92vw);
  margin: 1.2rem auto 0;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--line);
  background: rgba(11, 19, 32, 0.75);
  backdrop-filter: blur(8px);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
}

.brand {
  text-decoration: none;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
}

.brand span {
  display: grid;
}

.brand strong {
  font-size: 0.98rem;
  line-height: 1;
}

.brand small {
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.topbar nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.topbar nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.82rem;
  border: 1px solid transparent;
  padding: 0.34rem 0.62rem;
  border-radius: 999px;
  transition: border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.topbar nav a:hover {
  color: var(--text);
  border-color: var(--line-strong);
  transform: translateY(-1px);
}

main {
  width: min(1160px, 92vw);
  margin: 1.1rem auto 0;
  padding-bottom: 3.3rem;
}

section {
  margin-top: 1.15rem;
  border: 1px solid var(--line);
  background: var(--surface-0);
  border-radius: 22px;
  padding: 1.3rem;
  box-shadow: var(--shadow);
}

.section-head h2 {
  margin: 0;
  font-size: clamp(1.2rem, 3vw, 1.85rem);
  letter-spacing: -0.02em;
}

.section-head p {
  margin: 0.46rem 0 0;
  color: var(--muted);
  max-width: 74ch;
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1rem;
  align-items: stretch;
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.74rem;
  color: var(--accent);
}

.hero h1 {
  margin: 0.35rem 0 0;
  font-size: clamp(1.75rem, 5vw, 3.2rem);
  line-height: 1.06;
  letter-spacing: -0.04em;
}

.hero-copy > p {
  margin: 0.7rem 0 0;
  color: var(--muted);
  max-width: 64ch;
}

.hero-actions {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.62rem;
}

.button {
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 0.56rem 0.96rem;
  text-decoration: none;
  color: var(--text);
  font-size: 0.82rem;
  background: rgba(255, 255, 255, 0.04);
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.button.primary {
  background: linear-gradient(120deg, rgba(61, 224, 193, 0.25), rgba(255, 139, 61, 0.24));
  border-color: rgba(61, 224, 193, 0.55);
}

.button:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
}

.hero-metrics {
  margin-top: 1rem;
  display: grid;
  gap: 0.62rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.metric {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface-1);
  padding: 0.7rem;
}

.metric strong {
  display: block;
  font-size: 0.9rem;
}

.metric small {
  display: block;
  margin-top: 0.22rem;
  color: var(--muted);
  font-size: 0.72rem;
}

.hero-terminal,
.terminal {
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  background: #050a12;
  overflow: hidden;
}

.terminal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  padding: 0.5rem 0.72rem;
  border-bottom: 1px solid rgba(173, 202, 233, 0.17);
  background: #0b1421;
  color: #d6e8ff;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.terminal-head button {
  border: 1px solid rgba(173, 202, 233, 0.36);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
  color: #d6e8ff;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.69rem;
  padding: 0.26rem 0.5rem;
  cursor: pointer;
}

pre {
  margin: 0;
  max-height: 25rem;
  overflow: auto;
  padding: 0.9rem;
}

code {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  line-height: 1.5;
  color: #cde7ff;
  white-space: pre;
}

.position-grid {
  margin-top: 0.9rem;
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.position-grid article {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface-1);
  padding: 0.85rem;
}

.position-grid h3 {
  margin: 0;
  font-size: 1rem;
}

.position-grid p {
  margin: 0.5rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.flow-steps {
  margin: 0.9rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.6rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.flow-steps li {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(150deg, rgba(61, 224, 193, 0.08), rgba(255, 139, 61, 0.08));
  padding: 0.72rem;
}

.flow-steps strong {
  display: block;
  font-size: 0.93rem;
}

.flow-steps span {
  margin-top: 0.3rem;
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
}

.scenario-layout {
  margin-top: 0.9rem;
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 0.8rem;
}

.scenario-list {
  display: grid;
  gap: 0.55rem;
  align-content: start;
}

.scenario-button {
  text-align: left;
  border: 1px solid var(--line);
  background: var(--surface-1);
  color: var(--text);
  border-radius: 12px;
  padding: 0.64rem;
  cursor: pointer;
  transition: border-color 0.18s ease, transform 0.18s ease, background 0.18s ease;
}

.scenario-button strong {
  display: block;
  font-size: 0.86rem;
}

.scenario-button small {
  display: block;
  margin-top: 0.24rem;
  color: var(--muted);
  font-size: 0.72rem;
}

.scenario-button[aria-selected="true"] {
  border-color: rgba(61, 224, 193, 0.64);
  background: linear-gradient(140deg, rgba(61, 224, 193, 0.15), rgba(255, 139, 61, 0.1));
}

.scenario-button:hover {
  transform: translateY(-1px);
  border-color: var(--line-strong);
}

.scenario-view {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface-1);
  padding: 0.95rem;
}

.scenario-view h3 {
  margin: 0;
  font-size: 1.22rem;
}

.scenario-view p {
  margin: 0.42rem 0 0;
  color: var(--muted);
}

.meta {
  margin-top: 0.65rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.42rem;
}

.chip {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.22rem 0.52rem;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.68rem;
  color: #cbddf3;
  background: rgba(255, 255, 255, 0.03);
}

.tabs {
  margin-top: 0.72rem;
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.tab {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  padding: 0.28rem 0.64rem;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  cursor: pointer;
}

.tab[aria-selected="true"] {
  border-color: rgba(61, 224, 193, 0.62);
  background: rgba(61, 224, 193, 0.14);
}

.data-links {
  margin-top: 0.62rem;
  font-size: 0.76rem;
}

.data-links a {
  color: #7dd3ff;
  text-decoration: none;
}

.loop-layout {
  margin-top: 0.9rem;
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 0.8rem;
}

.loop-steps {
  display: grid;
  gap: 0.52rem;
}

.loop-step {
  border: 1px solid var(--line);
  background: var(--surface-1);
  border-radius: 12px;
  padding: 0.62rem;
  cursor: pointer;
}

.loop-step[aria-selected="true"] {
  border-color: rgba(255, 139, 61, 0.7);
  background: linear-gradient(140deg, rgba(255, 139, 61, 0.17), rgba(61, 224, 193, 0.08));
}

.loop-step strong {
  display: block;
  font-size: 0.88rem;
}

.loop-step small {
  display: block;
  margin-top: 0.24rem;
  color: var(--muted);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.7rem;
}

.loop-detail {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface-1);
  padding: 0.95rem;
}

.loop-detail h3 {
  margin: 0;
}

.loop-detail p {
  margin: 0.5rem 0 0;
  color: var(--muted);
}

.loop-bars {
  margin-top: 0.75rem;
  display: grid;
  gap: 0.46rem;
}

.bar-row {
  display: grid;
  gap: 0.26rem;
}

.bar-head {
  display: flex;
  justify-content: space-between;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
}

.bar-track {
  border: 1px solid var(--line);
  border-radius: 999px;
  height: 8px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.05);
}

.bar-fill {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.terminal.compact pre {
  max-height: 17rem;
}

.llm-grid {
  margin-top: 0.9rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
}

.llm-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface-1);
  padding: 0.85rem;
}

.llm-card h3 {
  margin: 0;
}

.llm-card p,
.llm-card li {
  color: var(--muted);
  font-size: 0.88rem;
}

.llm-card ul {
  margin: 0.55rem 0 0;
  padding-left: 1rem;
}

.delta-grid {
  margin-top: 0.52rem;
  display: grid;
  gap: 0.5rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.delta {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  padding: 0.55rem;
}

.delta strong {
  display: block;
  font-size: 0.84rem;
}

.delta span {
  color: var(--muted);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
}

.risk {
  margin-top: 0.7rem;
}

.install .terminal {
  margin-top: 0.8rem;
}

.sources {
  margin-top: 0.8rem;
  font-size: 0.84rem;
  color: var(--muted);
}

.sources a {
  color: #7dd3ff;
  text-decoration: none;
}

footer {
  width: min(1160px, 92vw);
  margin: 0 auto 1.7rem;
  color: var(--muted);
  font-size: 0.78rem;
  text-align: center;
}

@media (max-width: 1050px) {
  .hero,
  .scenario-layout,
  .loop-layout,
  .llm-grid {
    grid-template-columns: 1fr;
  }

  .scenario-list,
  .loop-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-metrics,
  .position-grid,
  .flow-steps,
  .delta-grid,
  .scenario-list,
  .loop-steps {
    grid-template-columns: 1fr;
  }

  section {
    padding: 1rem;
  }

  .topbar nav {
    width: 100%;
  }
}