/*
 * Subnautica 2 Strats — Brand Design Tokens
 * Game guide website color system based on Subnautica 2 visual language
 * Dark theme: charcoal black + deep cyan + aqua teal
 */

:root {
  /* === Brand Primary Scale (Deep Cyan) === */
  --sn-cyan: #0E7490;
  --sn-cyan-light: #0891B2;
  --sn-cyan-dark: #0B5E73;
  --sn-cyan-muted: rgba(14, 116, 144, 0.15);

  /* === Accent Scale (Aqua Teal) === */
  --sn-aqua: #22D3EE;
  --sn-aqua-light: #67E8F9;
  --sn-aqua-dark: #06B6D4;
  --sn-aqua-muted: rgba(34, 211, 238, 0.15);

  /* === Neutral Scale (Charcoal / Warm Gray) === */
  --sn-bg: #0D0D0D;
  --sn-bg-elevated: #141414;
  --sn-surface: #1A1A1A;
  --sn-surface-2: #222222;
  --sn-surface-hover: #2A2A2A;

  /* === Text Scale === */
  --sn-ink: #F0E8DC;
  --sn-ink-secondary: #B8A99A;
  --sn-ink-tertiary: #7A6E63;
  --sn-ink-muted: #4A4240;

  /* === Divider / Border === */
  --sn-line: rgba(240, 232, 220, 0.08);
  --sn-border: rgba(240, 232, 220, 0.12);

  /* === State Colors (semantic only) === */
  --sn-state-success: #3D8B4F;
  --sn-state-warning: #C4851C;
  --sn-state-error: #C43C3C;
  --sn-state-info: #4A7FB5;

  /* === Shadows (static alpha <= 0.05) === */
  --sn-shadow-card: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
  --sn-shadow-float: 0 8px 24px -6px rgba(0, 0, 0, 0.5);
  --sn-shadow-overlay: 0 24px 60px -16px rgba(0, 0, 0, 0.7);

  /* === Radius Scale === */
  --sn-radius-sm: 4px;
  --sn-radius-md: 8px;
  --sn-radius-lg: 12px;
  --sn-radius-full: 9999px;

  /* === Spacing (8pt grid) === */
  --sn-space-1: 4px;
  --sn-space-2: 8px;
  --sn-space-3: 12px;
  --sn-space-4: 16px;
  --sn-space-5: 24px;
  --sn-space-6: 32px;
  --sn-space-7: 48px;
  --sn-space-8: 80px;
  --sn-space-9: 120px;

  /* === Typography === */
  --sn-font-display: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
  --sn-font-body: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
  --sn-font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* === Semantic Aliases for apply-html-head-contract.mjs === */
  --sn-background: var(--sn-bg);
  --sn-foreground: var(--sn-ink);
  --sn-card: var(--sn-surface);
  --sn-card-foreground: var(--sn-ink);
  --sn-popover: var(--sn-surface-2);
  --sn-popover-foreground: var(--sn-ink);
  --sn-primary: var(--sn-cyan);
  --sn-primary-foreground: #F0E8DC;
  --sn-muted: var(--sn-surface);
  --sn-muted-foreground: var(--sn-ink-tertiary);
  --sn-border: var(--sn-border);
  --sn-input: var(--sn-border);
  --sn-ring: var(--sn-cyan);
  --sn-radius-small: var(--sn-radius-sm);
  --sn-radius-medium: var(--sn-radius-md);
  --sn-radius-large: var(--sn-radius-lg);

  /* === Tailwind @theme inline mapping === */
  --color-background: var(--sn-bg);
  --color-foreground: var(--sn-ink);
  --color-card: var(--sn-surface);
  --color-card-foreground: var(--sn-ink);
  --color-popover: var(--sn-surface-2);
  --color-popover-foreground: var(--sn-ink);
  --color-primary: var(--sn-cyan);
  --color-primary-foreground: #F0E8DC;
  --color-muted: var(--sn-surface);
  --color-muted-foreground: var(--sn-ink-tertiary);
  --color-border: var(--sn-border);
  --color-input: var(--sn-border);
  --color-ring: var(--sn-cyan);

  /* Radius tokens for @theme */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* State color theme tokens */
  --color-success: var(--sn-state-success);
  --color-warning: var(--sn-state-warning);
  --color-error: var(--sn-state-error);
  --color-info: var(--sn-state-info);
}

/* === Display Typography === */
.sn-display {
  font-family: var(--sn-font-display);
  font-size: clamp(36px, 5vw, 72px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--sn-ink);
  text-wrap: balance;
}

/* === H1 === */
.sn-h1 {
  font-family: var(--sn-font-display);
  font-size: clamp(28px, 3.5vw, 48px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--sn-ink);
  text-wrap: balance;
}

/* === H2 === */
.sn-h2 {
  font-family: var(--sn-font-display);
  font-size: clamp(22px, 2.4vw, 32px);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--sn-ink);
}

/* === H3 === */
.sn-h3 {
  font-family: var(--sn-font-body);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--sn-ink);
}

/* === Body Large === */
.sn-body-lg {
  font-family: var(--sn-font-body);
  font-size: 18px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--sn-ink-secondary);
}

/* === Body === */
.sn-body {
  font-family: var(--sn-font-body);
  font-size: 15px;
  font-weight: 400;
  line-height: 1.7;
  color: var(--sn-ink-secondary);
}

/* === Caption === */
.sn-caption {
  font-family: var(--sn-font-body);
  font-size: 13px;
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: 0.005em;
  color: var(--sn-ink-tertiary);
}

/* === Mono === */
.sn-mono {
  font-family: var(--sn-font-mono);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.5;
}

/* === Brand Button === */
.sn-btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--sn-cyan);
  color: var(--sn-primary-foreground);
  border-radius: var(--sn-radius-md);
  font-family: var(--sn-font-body);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  transition: background-color 160ms cubic-bezier(.2,.8,.2,1), transform 120ms cubic-bezier(.2,.8,.2,1);
  cursor: pointer;
  border: none;
}

.sn-btn-primary:hover {
  background: var(--sn-cyan-light);
  transform: translateY(-1px);
}

.sn-btn-primary:active {
  transform: translateY(0);
  background: var(--sn-cyan-dark);
}

.sn-btn-primary:focus-visible {
  outline: 2px solid var(--sn-cyan);
  outline-offset: 2px;
}

/* === Secondary Button === */
.sn-btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: transparent;
  color: var(--sn-ink);
  border: 1px solid var(--sn-border);
  border-radius: var(--sn-radius-md);
  font-family: var(--sn-font-body);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.2;
  transition: background-color 160ms cubic-bezier(.2,.8,.2,1), border-color 160ms cubic-bezier(.2,.8,.2,1);
  cursor: pointer;
}

.sn-btn-secondary:hover {
  background: var(--sn-surface-hover);
  border-color: var(--sn-ink-tertiary);
}

/* === Tag === */
.sn-tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  background: var(--sn-cyan-muted);
  color: var(--sn-cyan-light);
  border-radius: var(--sn-radius-full);
  font-size: 12px;
  font-weight: 500;
  line-height: 1.4;
}

/* === Gold Accent Tag === */
.sn-tag-gold {
  background: var(--sn-aqua-muted);
  color: var(--sn-aqua-light);
}

/* === Card Component === */
.sn-card {
  background: var(--sn-surface);
  border: 1px solid var(--sn-border);
  border-radius: var(--sn-radius-lg);
  overflow: hidden;
  transition: transform 200ms cubic-bezier(.2,.8,.2,1), border-color 200ms cubic-bezier(.2,.8,.2,1);
}

.sn-card:hover {
  transform: translateY(-2px);
  border-color: rgba(240, 232, 220, 0.18);
}

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