/* BrightMind AI — Redesign System
   Tech minimalist + cleaned-up dark, single accent, no gradient overload */

:root {
  /* Default palette: Graphite + Electric */
  --bg: #0a0d12;
  --bg-elev: #11151c;
  --bg-elev-2: #161b24;
  --border: #1f2632;
  --border-strong: #2a3342;
  --fg: #e7ebf2;
  --fg-muted: #9aa3b2;
  --fg-dim: #6b7280;
  --accent: #7dd3fc;          /* Electric cyan — single accent */
  --accent-strong: #38bdf8;
  --accent-soft: rgba(125, 211, 252, 0.08);
  --warn: #fb923c;
  --success: #34d399;
  --danger: #f87171;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Fraunces', 'Times New Roman', serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, monospace;

  --radius: 8px;
  --radius-lg: 14px;
  --radius-sm: 4px;

  --max-w: 1200px;
  --max-w-narrow: 880px;
}

/* Editorial palette */
[data-palette="editorial"] {
  --bg: #f7f5f0;
  --bg-elev: #ffffff;
  --bg-elev-2: #efeae0;
  --border: #e1dcd0;
  --border-strong: #c8c0ad;
  --fg: #1a1814;
  --fg-muted: #5a564e;
  --fg-dim: #8a8578;
  --accent: #6b1d2e;          /* Burgundy */
  --accent-strong: #8a2540;
  --accent-soft: rgba(107, 29, 46, 0.06);
}

/* Corporate navy palette */
[data-palette="corporate"] {
  --bg: #0b1424;
  --bg-elev: #11192b;
  --bg-elev-2: #182238;
  --border: #1f2b44;
  --border-strong: #2c3a55;
  --fg: #e8edf5;
  --fg-muted: #a0adc4;
  --fg-dim: #6c7891;
  --accent: #f5b942;          /* Warm gold */
  --accent-strong: #e6a627;
  --accent-soft: rgba(245, 185, 66, 0.08);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4 {
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0;
  color: var(--fg);
  text-wrap: balance;
}
h1 { font-size: clamp(2.5rem, 5vw, 4.25rem); letter-spacing: -0.035em; font-weight: 500; }
h2 { font-size: clamp(1.75rem, 3.2vw, 2.5rem); letter-spacing: -0.025em; }
h3 { font-size: 1.25rem; font-weight: 600; }

p { margin: 0; text-wrap: pretty; }

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-strong); }

[data-fonts="serif"] h1,
[data-fonts="serif"] h2 {
  font-family: var(--font-serif);
  font-weight: 400;
  letter-spacing: -0.02em;
}

/* Layout */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
}
.container-narrow {
  max-width: var(--max-w-narrow);
  margin: 0 auto;
  padding: 0 32px;
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  color: var(--fg);
}
.nav-brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: var(--fg);
  color: var(--bg);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  white-space: nowrap;
}
.nav-links a {
  color: var(--fg-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.15s;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--fg); }
.nav-links a.active { color: var(--fg); }
.nav-cta {
  padding: 8px 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--fg) !important;
  transition: background 0.15s, border-color 0.15s;
  white-space: nowrap;
}
@media (max-width: 1100px) {
  .nav-links { gap: 18px; }
  .nav-links a { font-size: 0.85rem; }
}
@media (max-width: 960px) {
  .nav-links { gap: 14px; }
  .nav-links a:not(.nav-cta) { font-size: 0.82rem; }
}
@media (max-width: 820px) {
  .nav-links a:not(.nav-cta) { display: none; }
}
.nav-cta:hover {
  background: var(--bg-elev);
  border-color: var(--fg-dim);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: var(--radius);
  font-weight: 500;
  font-size: 0.95rem;
  font-family: inherit;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.18s ease;
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--fg);
  color: var(--bg);
}
.btn-primary:hover {
  background: var(--accent);
  color: #061018;
  transform: translateY(-1px);
}
.btn-secondary {
  background: transparent;
  color: var(--fg);
  border-color: var(--border-strong);
}
.btn-secondary:hover {
  border-color: var(--fg);
  background: var(--bg-elev);
}
.btn-accent {
  background: var(--accent);
  color: #061018;
}
.btn-accent:hover {
  background: var(--accent-strong);
  transform: translateY(-1px);
}
[data-palette="editorial"] .btn-primary { background: var(--accent); color: #fff; }
[data-palette="editorial"] .btn-primary:hover { background: var(--accent-strong); color: #fff; }
[data-palette="editorial"] .btn-accent { color: #fff; }

/* Eyebrow / labels */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  font-weight: 500;
}

/* Sections */
.section {
  padding: 96px 0;
  border-top: 1px solid var(--border);
}
.section-tight { padding: 64px 0; }
.section-header {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 56px;
  max-width: 720px;
}
.section-header .eyebrow { margin-bottom: 4px; }

/* Cards */
.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color 0.2s, transform 0.2s;
}
.card:hover {
  border-color: var(--border-strong);
}
.card-accent {
  border-color: var(--accent);
  background: linear-gradient(180deg, var(--accent-soft), transparent 40%), var(--bg-elev);
}

/* Grid utilities */
.grid {
  display: grid;
  gap: 24px;
}
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
}
@media (max-width: 600px) {
  .grid-3, .grid-4, .grid-2 { grid-template-columns: 1fr; }
  .container, .container-narrow { padding: 0 20px; }
}

/* Footer */
.footer {
  padding: 64px 0 40px;
  border-top: 1px solid var(--border);
  background: var(--bg-elev);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-col h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fg-muted);
  margin-bottom: 16px;
  font-weight: 500;
}
.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col a {
  color: var(--fg);
  font-size: 0.9rem;
}
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.825rem;
  color: var(--fg-dim);
}
@media (max-width: 760px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

/* Subtle dot pattern background helper */
.dot-bg {
  background-image: radial-gradient(circle, var(--border-strong) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.4;
}

/* Marquee logos placeholder */
.logo-strip {
  display: flex;
  align-items: center;
  gap: 48px;
  flex-wrap: wrap;
  justify-content: center;
  padding: 24px 0;
}
.logo-placeholder {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fg-dim);
  border: 1px dashed var(--border-strong);
  padding: 8px 14px;
  border-radius: 4px;
  letter-spacing: 0.05em;
}

/* Stat */
.stat-num {
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  font-weight: 500;
  letter-spacing: -0.04em;
  color: var(--fg);
  line-height: 1;
  font-feature-settings: 'tnum';
}
[data-fonts="serif"] .stat-num {
  font-family: var(--font-serif);
  font-weight: 400;
}
.stat-label {
  font-size: 0.85rem;
  color: var(--fg-muted);
  margin-top: 8px;
}

/* Glow disabled by default — only on .has-glow */
.has-glow {
  box-shadow: 0 0 60px -10px var(--accent-soft);
}

/* utility */
.text-muted { color: var(--fg-muted); }
.text-dim { color: var(--fg-dim); }
.mono { font-family: var(--font-mono); }
.accent { color: var(--accent); }

/* Visual divider */
.divider-dot {
  display: inline-block;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--fg-dim);
  margin: 0 10px;
  vertical-align: middle;
}

/* Code-style chip */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--border-strong);
  border-radius: 100px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--fg-muted);
  background: var(--bg-elev);
}
.chip-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
}

/* Image placeholder */
.img-placeholder {
  background:
    repeating-linear-gradient(
      135deg,
      var(--bg-elev) 0,
      var(--bg-elev) 10px,
      var(--bg-elev-2) 10px,
      var(--bg-elev-2) 20px
    );
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: grid;
  place-items: center;
  color: var(--fg-dim);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}