/* Creative Brains — Website Base Styles (Variante C · Signal) */
:root {
  --ink: #08090B;
  --ink-soft: #2E323A;
  --ink-mute: #737985;
  --rule: #E1E4E9;
  --bg: #F4F5F7;
  --surface: #FFFFFF;
  --ink-d: #F4F5F7;
  --ink-soft-d: #B6B9C2;
  --ink-mute-d: #5A5E68;
  --rule-d: #1F2128;
  --bg-d: #08090B;
  --surface-d: #101218;
  --dev: #1B3FB8;
  --marketing: #D4FF3D;
  --business: #FF3D8A;
  --accent: #1B3FB8;
  --accent-on-dark: #D4FF3D;
  --accent-ink: #FFFFFF;
  --font: 'Geist', 'Inter', system-ui, sans-serif;
  --mono: 'Geist Mono', 'JetBrains Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  letter-spacing: -0.011em;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

.mono {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}

.rule { height: 1px; background: var(--rule); border: 0; margin: 0; }

/* Header */
.cb-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(244, 245, 247, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rule);
}
.cb-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  max-width: 1280px;
  margin: 0 auto;
  position: relative;
}
.cb-logo {
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.04em;
}
.cb-logo .dot { color: var(--dev); }
.cb-nav { display: flex; gap: 28px; }
.cb-nav a {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: lowercase;
  color: var(--ink-soft);
  transition: color .15s;
}
.cb-nav a:hover { color: var(--ink); }
.cb-nav a.active { color: var(--ink); }

.cb-cta {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: lowercase;
  background: var(--ink);
  color: var(--bg);
  padding: 10px 16px;
  border: 0;
  cursor: pointer;
  transition: background .15s;
}
.cb-cta:hover { background: var(--accent); color: var(--accent-ink); }

/* Section */
.cb-section { padding: 96px 0; }
.cb-section-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
  text-transform: uppercase;
  margin-bottom: 16px;
}
.cb-section-title {
  font-size: 56px;
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 1.0;
  margin: 0 0 24px;
  max-width: 900px;
}
.cb-section-title .mute { color: var(--ink-mute); }
.cb-section-lede {
  font-size: 18px;
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 640px;
  margin: 0;
}

/* Pillar tag */
.cb-pillar {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  color: var(--ink);
  padding: 6px 10px;
  background: var(--surface);
  border: 1px solid var(--rule);
}
.cb-pillar .dot { width: 8px; height: 8px; }
.cb-pillar.dev .dot { background: var(--dev); }
.cb-pillar.mkt .dot { background: var(--marketing); }
.cb-pillar.biz .dot { background: var(--business); }

/* Footer */
.cb-footer {
  padding: 48px 0;
  border-top: 1px solid var(--rule);
}
.cb-footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  color: var(--ink-mute);
  letter-spacing: 0.04em;
}

/* ============================================================
   RESPONSIVE — Tablet & Mobile
   ============================================================ */

/* Burger button (mobile only) */
.cb-burger {
  display: none;
  background: transparent;
  border: 1px solid var(--rule);
  padding: 10px 12px;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: lowercase;
  color: var(--ink);
  letter-spacing: 0.04em;
}

@media (max-width: 1024px) {
  .container { padding: 0 24px; }
  .cb-section { padding: 72px 0; }
  .cb-section-title { font-size: 44px; }
  .cb-section-lede { font-size: 16px; }
  .cb-header-inner { padding: 14px 24px; }
  .cb-nav { gap: 18px; }
  .cb-nav a { font-size: 11px; }
}

@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .cb-section { padding: 56px 0; }
  .cb-section-title { font-size: 34px; line-height: 1.05; }
  .cb-section-lede { font-size: 15px; }
  .cb-header-inner { padding: 12px 20px; }
  .cb-burger { display: inline-flex; }
  .cb-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--rule);
    flex-direction: column;
    gap: 0;
    padding: 8px 0;
  }
  .cb-nav.open { display: flex; }
  .cb-nav a {
    padding: 14px 20px;
    border-bottom: 1px solid var(--rule);
    font-size: 13px;
  }
  .cb-nav a:last-child { border-bottom: 0; }
  .cb-cta { padding: 9px 14px; font-size: 11px; }
  .cb-footer-inner { flex-direction: column; gap: 12px; }
}