/* ══════════════════════════════════════════════
   CleanQuery Design System — Dark Canvas
   ══════════════════════════════════════════════ */

:root {
  /* Gray surface hierarchy (4 layers) */
  --gray-950: hsl(0, 0%, 4%);
  --gray-900: hsl(0, 0%, 8%);
  --gray-800: hsl(0, 0%, 15%);
  --gray-700: hsl(0, 0%, 22%);

  /* Text hierarchy */
  --text-primary: hsl(0, 0%, 98%);
  --text-secondary: hsl(0, 0%, 78%);
  --text-tertiary: hsl(0, 0%, 60%);
  --text-ghost: hsl(0, 0%, 42%);

  /* Accent — Indigo */
  --indigo-400: #818cf8;
  --indigo-500: #6366f1;
  --indigo-600: #4f46e5;
  --indigo-700: #4338ca;

  /* Semantic (data only) */
  --green: #34d399;
  --amber: #fbbf24;
  --red: #f87171;

  /* Layout */
  --max-width: 960px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;

  /* Legacy aliases (so existing components don't break) */
  --bg: var(--gray-950);
  --surface: var(--gray-900);
  --text: var(--text-primary);
  --muted: var(--text-tertiary);
  --accent: var(--indigo-600);
  --radius-lg: 16px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

/* ── Focus ── */
:focus-visible {
  outline: 2px solid var(--indigo-400);
  outline-offset: 2px;
}

/* ── Skip nav ── */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 8px 16px;
  background: var(--indigo-600);
  color: #ffffff;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}

.skip-link:focus {
  left: 50%;
  transform: translateX(-50%);
}

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--gray-950);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--gray-700);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-ghost);
}

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Container ── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Sections ── */
.section {
  padding: 48px 0;
}

@media (min-width: 768px) {
  .section {
    padding: 96px 0;
  }
}

/* ── Section labels (indigo uppercase anchors) ── */
.section-label {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--indigo-400);
  margin-bottom: 12px;
}

/* ── Section headings ── */
.section-heading {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin: 0 0 16px;
  line-height: 1.15;
}

@media (min-width: 768px) {
  .section-heading {
    font-size: 36px;
  }
}

.section-subhead {
  font-size: 16px;
  color: var(--text-tertiary);
  margin: 0;
  line-height: 1.6;
}

/* ── Card pattern ── */
.card {
  background: var(--gray-900);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-800);
  padding: 24px;
  transition: border-color 0.2s ease;
}

.card:hover {
  border-color: var(--gray-700);
}

/* ── Button: Primary ── */
.button-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  border-radius: var(--radius-md);
  background: var(--indigo-600);
  color: #ffffff;
  border: none;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
  transition: background 0.15s ease, box-shadow 0.15s ease;
}

.button-primary:hover {
  background: var(--indigo-500);
  box-shadow: 0 4px 16px rgba(79, 70, 229, 0.4);
}

/* ── Button: Ghost ── */
.button-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--gray-700);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.button-ghost:hover {
  border-color: var(--text-ghost);
  color: var(--text-primary);
}

/* ── Tab nav ── */
.tab-nav {
  display: flex;
  gap: 16px;
  padding: 0 16px;
  margin-top: 8px;
  border-bottom: 1px solid var(--gray-800);
  overflow-x: auto;
  scrollbar-width: none;
}

.tab-nav::-webkit-scrollbar {
  display: none;
}

.tab-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 10px 0;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-tertiary);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.15s ease;
}

.tab-link:hover {
  color: var(--text-secondary);
}

.tab-link--active {
  color: var(--text-primary);
}

.tab-link--active::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 100%;
  background: var(--indigo-500);
  border-radius: 999px;
}

@media (min-width: 768px) {
  .tab-nav {
    justify-content: center;
    gap: 32px;
    padding: 0 48px;
  }

  .tab-link {
    padding: 14px 0;
    font-size: 15px;
  }
}

/* ── Badge variants ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  padding: 3px 10px;
  border-radius: var(--radius-sm);
}

.badge-live {
  background: rgba(52, 211, 153, 0.1);
  color: var(--green);
  border: 1px solid rgba(52, 211, 153, 0.2);
}

.badge-soon {
  background: rgba(99, 102, 241, 0.1);
  color: var(--indigo-400);
  border: 1px solid rgba(99, 102, 241, 0.2);
}