/* Acai Project — homepage styles */

:root {
  --bg: #FDFCFA;
  --text: #16151A;
  --text-secondary: #4A4652;
  --text-muted: #8A8592;
  --accent: #5B2A86;
  --accent-hover-wash: #F5F0FA;

  --dark-bg: #141216;
  --dark-text: #E8E4EC;
  --dark-panel: #1D1A21;
  --dark-border: #2C2833;
  --dark-muted: #77707F;
  --dark-accent: #C9A6E8;

  --gutter: 56px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'IBM Plex Sans', sans-serif;
}

a { color: inherit; }

.rule {
  border-bottom: 1px solid var(--text);
}

/* ---------- Nav ---------- */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px var(--gutter);
  border-bottom: 1px solid var(--text);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-logo span {
  font: 600 16px/1 'IBM Plex Mono', monospace;
  letter-spacing: -0.03em;
}

.nav-links {
  display: flex;
  gap: 28px;
  font: 400 13px/1 'IBM Plex Mono', monospace;
}

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

.nav-links a:hover {
  text-decoration: underline;
}

.nav-links a.nav-github {
  color: var(--accent);
  font-weight: 500;
}

/* ---------- Hero ---------- */
.hero {
  padding: 88px var(--gutter) 68px;
  border-bottom: 1px solid var(--text);
}

.hero-kicker {
  font: 400 12px/1 'IBM Plex Mono', monospace;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: 30px;
}

.hero h1 {
  font: 500 72px/1.1 'IBM Plex Mono', monospace;
  letter-spacing: -0.045em;
  margin: 0;
  max-width: 1100px;
}

.hero h1 em {
  color: var(--accent);
  font-weight: 400;
  font-style: italic;
}

.hero p {
  font-size: 19px;
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 620px;
  margin: 30px 0 0;
}

/* ---------- Philosophy ---------- */
.philosophy {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 64px;
  padding: 60px var(--gutter);
  border-bottom: 1px solid var(--text);
}

.philosophy-quote {
  font: italic 400 24px/1.5 'IBM Plex Mono', monospace;
  letter-spacing: -0.02em;
  margin: 0;
}

.philosophy-body {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.philosophy-body p {
  margin: 0;
}

.philosophy-body strong {
  color: var(--text);
}

/* ---------- Code section (dark) ---------- */
.code-section {
  background: var(--dark-bg);
  color: var(--dark-text);
  padding: 60px var(--gutter) 56px;
}

.code-section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 26px;
}

.code-section-header h2 {
  font: 500 32px/1.15 'IBM Plex Mono', monospace;
  letter-spacing: -0.03em;
  margin: 0;
  color: #FFFFFF;
}

.code-section-caption {
  font: 400 12px/1 'IBM Plex Mono', monospace;
  color: var(--dark-muted);
}

.trigger-tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--dark-border);
  margin-bottom: 28px;
}

.trigger-tab {
  font: 400 12px/1 'IBM Plex Mono', monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 12px 18px;
  color: var(--dark-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  cursor: pointer;
}

.trigger-tab.active {
  color: #FFFFFF;
  font-weight: 600;
  border-bottom: 2px solid var(--dark-accent);
}

.trigger-panel {
  display: none;
}

.trigger-panel.active {
  display: block;
  animation: fade-in 150ms ease;
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.code-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
}

.code-col-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--dark-border);
  margin-bottom: 14px;
  font: 500 12px/1 'IBM Plex Mono', monospace;
}

.code-col-header .lang {
  color: #FFFFFF;
}

.code-col-header .pkg {
  color: var(--dark-muted);
  font-weight: 400;
}

.code-panel-label {
  font: 400 10.5px/1 'IBM Plex Mono', monospace;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dark-muted);
  margin-bottom: 8px;
}

.code-panel {
  margin: 0 0 14px;
  padding: 16px 18px;
  background: var(--dark-panel);
  border: 1px solid var(--dark-border);
  border-radius: 6px;
  font: 400 12px/1.7 'IBM Plex Mono', monospace;
  overflow: auto;
}

.code-panel:last-child {
  margin-bottom: 0;
}

.code-panel .tok-comment {
  color: var(--dark-muted);
  font-style: italic;
}

.code-panel .tok-string {
  color: var(--dark-accent);
}

.code-panel .tok-keyword {
  color: #FFFFFF;
  font-weight: 600;
}

.wire-up {
  margin-top: 20px;
}

/* ---------- Features ---------- */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--text);
  border-top: 1px solid var(--text);
}

.feature {
  padding: 38px 32px;
  border-right: 1px solid var(--text);
}

.feature:first-child {
  padding-left: var(--gutter);
}

.feature:last-child {
  border-right: none;
  padding-right: var(--gutter);
}

.feature-index {
  font: 400 12px/1 'IBM Plex Mono', monospace;
  color: var(--accent);
  margin-bottom: 14px;
}

.feature-title {
  font: 500 19px/1.25 'IBM Plex Mono', monospace;
  letter-spacing: -0.02em;
  margin: 0 0 10px;
}

.feature p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0;
}

/* ---------- Event sources ---------- */
.event-sources {
  padding: 34px var(--gutter);
  border-bottom: 1px solid var(--text);
  display: flex;
  align-items: baseline;
  gap: 24px;
  flex-wrap: wrap;
}

.event-sources-label {
  font: 400 11px/1 'IBM Plex Mono', monospace;
  letter-spacing: 0.12em;
  color: var(--text-muted);
}

.chips {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  font: 400 12px/1 'IBM Plex Mono', monospace;
}

.chip {
  border: 1px solid var(--text);
  padding: 6px 12px;
}

/* ---------- Footer links ---------- */
.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.footer-card {
  display: block;
  padding: 34px 32px;
  border-right: 1px solid var(--text);
  text-decoration: none;
  color: var(--text);
}

.footer-card:first-child {
  padding-left: var(--gutter);
}

.footer-card:last-child {
  border-right: none;
  padding-right: var(--gutter);
}

.footer-card:hover {
  background: var(--accent-hover-wash);
}

.footer-card-title {
  font: 500 13px/1 'IBM Plex Mono', monospace;
  margin: 0 0 8px;
}

.footer-card-sub {
  font-size: 13px;
  color: var(--text-muted);
}

/* ---------- Agent discovery bar ---------- */
.agent-bar {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 10px;
  padding: 16px var(--gutter);
  border-top: 1px solid var(--text);
  font: 400 12px/1 'IBM Plex Mono', monospace;
  color: var(--text-muted);
}

.agent-bar a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.agent-bar a:hover {
  text-decoration: underline;
}

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  :root {
    --gutter: 24px;
  }

  .hero h1 {
    font-size: 48px;
  }

  .philosophy {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .code-grid {
    grid-template-columns: 1fr;
  }

  .features {
    grid-template-columns: 1fr;
  }

  .feature {
    border-right: none;
    border-bottom: 1px solid var(--text);
    padding-left: var(--gutter) !important;
    padding-right: var(--gutter) !important;
  }

  .feature:last-child {
    border-bottom: none;
  }

  .footer-links {
    grid-template-columns: 1fr;
  }

  .footer-card {
    border-right: none;
    border-bottom: 1px solid var(--text);
    padding-left: var(--gutter) !important;
    padding-right: var(--gutter) !important;
  }

  .footer-card:last-child {
    border-bottom: none;
  }

  .code-section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

@media (max-width: 600px) {
  .nav {
    flex-wrap: wrap;
    row-gap: 14px;
  }

  .nav-links {
    gap: 16px;
    flex-wrap: wrap;
  }
}