/* CodeAgent project site — warm technical portfolio palette, system fonts */

:root {
  color-scheme: light dark;
  --bg: #f4f1ec;
  --bg-elevated: #faf8f5;
  --fg: #1f2933;
  --muted: #5c6773;
  --border: #d8d2c8;
  --accent: #2f6f6b;
  --accent-hover: #255a57;
  --accent-soft: #e3efed;
  --card: #fffcf8;
  --shadow: 0 1px 2px rgb(31 41 51 / 6%), 0 8px 24px rgb(31 41 51 / 5%);
  --code-bg: #ebe6df;
  --hero-gradient: linear-gradient(
    165deg,
    var(--accent-soft) 0%,
    var(--bg-elevated) 42%,
    var(--bg) 100%
  );
  --radius: 10px;
  --radius-lg: 14px;
  --content: min(52rem, 100% - 2.5rem);
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181c;
    --bg-elevated: #1c1f26;
    --fg: #e8eaed;
    --muted: #9aa3ad;
    --border: #343a44;
    --accent: #6eb5ae;
    --accent-hover: #8ec9c3;
    --accent-soft: #1e2a28;
    --card: #22262e;
    --shadow: 0 1px 2px rgb(0 0 0 / 25%), 0 10px 28px rgb(0 0 0 / 22%);
    --code-bg: #2a3038;
    --hero-gradient: linear-gradient(
      165deg,
      var(--accent-soft) 0%,
      var(--bg-elevated) 45%,
      var(--bg) 100%
    );
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--fg);
  background: var(--bg);
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

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

.site-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-elevated) 88%, transparent);
  backdrop-filter: blur(10px);
}

.site-nav-inner {
  max-width: var(--content);
  margin: 0 auto;
  padding: 0.65rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.25rem;
}

.site-nav .brand {
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--fg);
  text-decoration: none;
}

.site-nav .brand:hover {
  color: var(--accent);
}

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  font-size: 0.9rem;
}

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

.site-nav a:hover {
  color: var(--fg);
}

.wrap {
  max-width: var(--content);
  margin: 0 auto;
  padding: 0 1.25rem 4rem;
}

.hero {
  margin: 0 -1.25rem;
  padding: 3.25rem 1.25rem 2.75rem;
  background: var(--hero-gradient);
  border-bottom: 1px solid var(--border);
}

.hero-inner {
  max-width: var(--content);
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero h1 {
  margin: 0 0 0.65rem;
  font-size: clamp(2rem, 4vw, 2.65rem);
  font-weight: 650;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.tagline {
  margin: 0 0 1.75rem;
  font-size: 1.125rem;
  color: var(--muted);
  max-width: 38rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-block;
  padding: 0.6rem 1.15rem;
  border-radius: var(--radius);
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--fg);
  box-shadow: var(--shadow);
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.btn:hover {
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: transparent;
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
}

@media (prefers-color-scheme: dark) {
  .btn-primary {
    color: #0f1419;
  }

  .btn-primary:hover {
    color: #0f1419;
  }
}

@media (prefers-reduced-motion: reduce) {
  .btn {
    transition: none;
  }

  .btn:hover {
    transform: none;
  }
}

section {
  padding: 2.75rem 0;
  border-bottom: 1px solid var(--border);
}

section:last-of-type {
  border-bottom: none;
}

.section-lead {
  margin: -0.25rem 0 1.5rem;
  max-width: 42rem;
  color: var(--muted);
}

h2 {
  margin: 0 0 0.5rem;
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

h3 {
  margin: 1.5rem 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 600;
}

p {
  margin: 0 0 1rem;
  max-width: 42rem;
}

ul {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
  max-width: 42rem;
}

li {
  margin-bottom: 0.4rem;
}

li::marker {
  color: var(--accent);
}

.grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(14.5rem, 1fr));
}

.card {
  padding: 1.15rem 1.2rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.card strong {
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.98rem;
}

.card p {
  margin: 0;
  font-size: 0.94rem;
  color: var(--muted);
  max-width: none;
}

.demo-panel {
  padding: 1.25rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.demo-panel > p:first-child {
  margin-top: 0;
  font-size: 0.95rem;
  color: var(--muted);
}

.demo-video {
  display: block;
  width: 100%;
  max-width: 100%;
  margin: 0.75rem 0 0.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #0d1117;
}

.demo-panel .demo-meta {
  margin: 0;
  font-size: 0.9rem;
}

.eval-highlights {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  margin-bottom: 1.25rem;
}

.eval-stat {
  padding: 1.2rem 1.25rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.eval-stat-primary {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
  background: linear-gradient(
    145deg,
    color-mix(in srgb, var(--accent-soft) 70%, var(--card)) 0%,
    var(--card) 100%
  );
}

.eval-stat-value {
  display: block;
  font-size: 1.5rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  color: var(--fg);
}

.eval-stat-label {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.92rem;
  font-weight: 600;
}

.eval-stat-detail {
  margin: 0.5rem 0 0;
  font-size: 0.9rem;
  color: var(--muted);
  max-width: none;
}

.stats {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.stats th,
.stats td {
  text-align: left;
  padding: 0.65rem 0.9rem;
  border-bottom: 1px solid var(--border);
}

.stats tr:last-child td {
  border-bottom: none;
}

.stats th {
  font-weight: 600;
  background: color-mix(in srgb, var(--bg) 50%, var(--card));
}

.mermaid-wrap {
  padding: 1.25rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow-x: auto;
}

.mermaid {
  margin: 0;
}

footer {
  padding: 2.5rem 0 0.5rem;
  font-size: 0.9rem;
  color: var(--muted);
}

footer p {
  max-width: none;
}

code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: var(--code-bg);
  padding: 0.12em 0.4em;
  border-radius: 5px;
}