/* =====================================================================
   KNA DESIGN TOKENS - theme.css
   Single source of truth for colour, type, spacing, motion, radius,
   shadow and z-index (Universal Web Design System Template v1.0, §3).
   Three layers:  1. primitives (raw values)  2. semantic (purpose)
                  3. component (per component)
   No raw hex, px sizes or durations may appear outside this file.
   Dark is the default theme; [data-theme="light"] mirrors it.
   ===================================================================== */

@font-face {
  font-family: "Inter";
  src: url("../fonts/inter-latin-wght.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Cormorant Garamond";
  src: url("../fonts/cormorant-500.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Cormorant Garamond";
  src: url("../fonts/cormorant-600.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Cormorant Garamond";
  src: url("../fonts/cormorant-500-italic.woff2") format("woff2");
  font-weight: 500;
  font-style: italic;
  font-display: swap;
}

:root {
  /* ── Layer 1: primitives ─────────────────────────────────────────── */
  --neutral-950: #08090b;
  --neutral-900: #0e1013;
  --neutral-850: #121518;
  --neutral-800: #171a1f;
  --neutral-700: #22262d;
  --neutral-600: #2f343c;
  --neutral-400: #8a8f98;
  --neutral-200: #d9d5cc;
  --neutral-100: #f5f1e8;
  --neutral-50: #fbf9f4;
  --white: #ffffff;

  --gold-300: #e6cf9c;
  --gold-400: #d8bc82;
  --gold-500: #c8a96a; /* brand gold (brightened from legacy #aa9166 for contrast) */
  --gold-600: #aa9166;
  --gold-700: #7a6233; /* gold for light backgrounds (AA on ivory) */
  --gold-800: #5c4a26;
  --navy-700: #1f2a6b; /* from the KNA wordmark */
  --navy-900: #121a45;

  --red-500: #ef4444;
  --red-700: #b91c1c;
  --emerald-500: #10b981;
  --emerald-700: #047857;
  --amber-500: #f59e0b;

  --radius-sm-raw: 0.25rem;
  --radius-md-raw: 0.375rem;
  --radius-lg-raw: 0.75rem;
  --radius-xl-raw: 1.25rem;
  --radius-full-raw: 9999px;

  --anim-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
  --ease-standard: cubic-bezier(0.2, 0, 0, 1);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);

  /* ── Layer 2: semantic ───────────────────────────────────────────── */
  --color-brand: var(--gold-500);
  --color-brand-hover: var(--gold-400);
  --color-brand-strong: var(--gold-300);
  --color-brand-soft: rgba(200, 169, 106, 0.12);
  --color-accent: var(--navy-700);
  --color-accent-glow: rgba(200, 169, 106, 0.22);

  --color-bg-body: var(--neutral-900);
  --color-bg-deep: var(--neutral-950);
  --color-bg-surface-1: var(--neutral-850);
  --color-bg-surface-2: var(--neutral-800);
  --color-bg-surface-3: var(--neutral-700);
  --color-bg-alt: var(--neutral-850);
  --color-bg-overlay: rgba(8, 9, 11, 0.6);
  --color-card-bg: rgba(255, 255, 255, 0.03);
  --color-card-bg-hover: rgba(255, 255, 255, 0.05);
  --color-glass: rgba(18, 21, 24, 0.72);

  --color-text-main: var(--neutral-100);
  --color-text-muted: rgba(245, 241, 232, 0.72);
  --color-text-subtle: rgba(245, 241, 232, 0.52);
  --color-text-disabled: rgba(245, 241, 232, 0.28);
  --color-text-on-brand: var(--neutral-900);
  --color-link: var(--gold-400);

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.25);
  --border-active: var(--color-brand);
  --border-gold: rgba(200, 169, 106, 0.35);
  --divider: rgba(255, 255, 255, 0.06);

  --color-error: var(--red-500);
  --color-error-bg: rgba(239, 68, 68, 0.1);
  --color-success: var(--emerald-500);
  --color-success-bg: rgba(16, 185, 129, 0.1);
  --color-warning: var(--amber-500);
  --color-warning-bg: rgba(245, 158, 11, 0.1);
  --color-info-bg: rgba(200, 169, 106, 0.1);

  /* Spacing scale (px equivalents: 4 8 12 16 20 24 32 48 60 80 100) */
  --space-2xs: 0.25rem;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.25rem;
  --space-xl: 1.5rem;
  --space-2xl: 2rem;
  --space-3xl: 3rem;
  --space-4xl: 3.75rem;
  --space-5xl: 5rem;
  --space-6xl: 6.25rem;

  /* Typography - Perfect Fourth (1.333) */
  --font-heading: "Cormorant Garamond", Georgia, "Times New Roman", serif;
  --font-body: "Inter", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-code: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --font-size-xs: 0.6875rem;
  --font-size-sm: 0.75rem;
  --font-size-base: 1rem;
  --font-size-md: 1.333rem;
  --font-size-lg: 1.777rem;
  --font-size-xl: 2.369rem;
  --font-size-2xl: 3.157rem;
  --font-size-3xl: 4.209rem;
  --font-size-body-sm: 0.875rem;
  --font-size-display: clamp(2.6rem, 6.4vw, 5.6rem);
  --font-size-h1: clamp(2.25rem, 4.6vw, 3.157rem);
  --font-size-h2: clamp(1.75rem, 3.4vw, 2.369rem);
  --font-size-h3: clamp(1.375rem, 2.4vw, 1.777rem);
  --font-size-h4: clamp(1.125rem, 1.6vw, 1.333rem);
  --font-size-watermark: clamp(5rem, 12vw, 9rem);

  --line-height-tight: 1.15;
  --line-height-snug: 1.3;
  --line-height-relaxed: 1.6;
  --letter-spacing-eyebrow: 0.15em;
  --letter-spacing-wide: 0.06em;
  --measure: 65ch;

  /* Layout */
  --container-max: 75rem;
  --container-pad: var(--space-md);
  --header-height: 4.5rem;
  --section-pad: var(--space-5xl);
  --section-pad-sm: 2.5rem;
  --section-header-max: 40.625rem;
  --border-width: 1px;
  --border-width-strong: 2px;
  --hit-area: 2.75rem;
  --input-height: 2.875rem;

  /* Radius */
  --radius-sm: var(--radius-sm-raw);
  --radius-md: var(--radius-md-raw);
  --radius-lg: var(--radius-lg-raw);
  --radius-xl: var(--radius-xl-raw);
  --radius-full: var(--radius-full-raw);
  --radius-interactive: var(--radius-md-raw);

  /* Motion */
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
  --duration-reveal: 900ms;
  --transition-fast: var(--duration-fast) var(--ease-standard);
  --transition-normal: var(--duration-normal) var(--ease-standard);
  --transition-slow: var(--duration-slow) var(--ease-standard);
  --motion-press: transform 100ms var(--anim-spring);
  --lift-hover: translateY(-2px);
  --lift-card: translateY(-8px);
  --press-scale: scale(0.96);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 18px 40px -12px rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 0 24px var(--color-accent-glow);
  --focus-ring: 2px solid var(--color-brand);
  --focus-offset: 2px;
  --focus-glow: 0 0 0 3px var(--color-accent-glow);
  --dev-glow-shadow: 0 0 24px 2px var(--dev-glow-a), 0 0 0 1px var(--dev-glow-b);

  /* Z-index scale (§12) */
  --z-base: 0;
  --z-raised: 10;
  --z-sticky: 100;
  --z-dropdown: 200;
  --z-drawer: 300;
  --z-overlay: 400;
  --z-modal: 500;
  --z-toast: 600;
  --z-tooltip: 700;

  /* ── Layer 3: component ──────────────────────────────────────────── */
  --btn-bg: var(--color-brand);
  --btn-bg-hover: var(--color-brand-hover);
  --btn-color: var(--color-text-on-brand);
  --btn-pad-y: 0.75rem;
  --btn-pad-x: 1.375rem;
  --btn-transition: var(--motion-press), background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
  --card-bg: var(--color-card-bg);
  --card-border: var(--border-subtle);
  --card-pad: var(--space-xl);
  --nav-bg: rgba(14, 16, 19, 0.78);
  --nav-blur: 14px;
  --glass-blur: 12px;
  --hero-overlay: linear-gradient(180deg, rgba(8, 9, 11, 0.2) 0%, rgba(8, 9, 11, 0.55) 60%, var(--neutral-900) 100%);
  --hero-glow: radial-gradient(60% 55% at 70% 35%, rgba(200, 169, 106, 0.18) 0%, rgba(200, 169, 106, 0) 70%);
  --gold-gradient: linear-gradient(135deg, var(--gold-300) 0%, var(--gold-500) 45%, var(--gold-700) 100%);
  --gold-line: linear-gradient(90deg, rgba(200, 169, 106, 0) 0%, var(--gold-500) 50%, rgba(200, 169, 106, 0) 100%);
  --input-bg: rgba(255, 255, 255, 0.04);
  --input-border: rgba(255, 255, 255, 0.14);
  --dev-glow-a: rgba(200, 169, 106, 0.3);
  --dev-glow-b: rgba(31, 42, 107, 0.35);
  --dev-border: rgba(255, 255, 255, 0.06);
  --dev-bg: rgba(255, 255, 255, 0.02);
  --dev-text: rgba(245, 241, 232, 0.5);
  --portal-sidebar-width: 15.5rem;

  color-scheme: dark;
}

/* ── Light mirror ──────────────────────────────────────────────────── */
[data-theme="light"] {
  --color-brand: var(--gold-700);
  --color-brand-hover: var(--gold-800);
  --color-brand-strong: var(--gold-800);
  --color-brand-soft: rgba(122, 98, 51, 0.1);
  --color-accent-glow: rgba(122, 98, 51, 0.18);
  --color-bg-body: var(--neutral-50);
  --color-bg-deep: var(--neutral-100);
  --color-bg-surface-1: var(--white);
  --color-bg-surface-2: var(--neutral-100);
  --color-bg-surface-3: var(--neutral-200);
  --color-bg-alt: var(--neutral-100);
  --color-bg-overlay: rgba(14, 16, 19, 0.45);
  --color-card-bg: var(--white);
  --color-card-bg-hover: var(--white);
  --color-glass: rgba(255, 255, 255, 0.8);
  --color-text-main: var(--neutral-900);
  --color-text-muted: rgba(14, 16, 19, 0.74);
  --color-text-subtle: rgba(14, 16, 19, 0.58);
  --color-text-disabled: rgba(14, 16, 19, 0.3);
  --color-text-on-brand: var(--white);
  --color-link: var(--gold-700);
  --border-subtle: rgba(14, 16, 19, 0.1);
  --border-hover: rgba(14, 16, 19, 0.28);
  --border-gold: rgba(122, 98, 51, 0.35);
  --divider: rgba(14, 16, 19, 0.08);
  --shadow-sm: 0 1px 2px rgba(14, 16, 19, 0.06);
  --shadow-md: 0 4px 10px -2px rgba(14, 16, 19, 0.08);
  --shadow-lg: 0 18px 40px -16px rgba(14, 16, 19, 0.22);
  --nav-bg: rgba(251, 249, 244, 0.82);
  --hero-overlay: linear-gradient(180deg, rgba(251, 249, 244, 0) 0%, rgba(251, 249, 244, 0.4) 60%, var(--neutral-50) 100%);
  --hero-glow: radial-gradient(60% 55% at 70% 35%, rgba(200, 169, 106, 0.22) 0%, rgba(200, 169, 106, 0) 70%);
  --input-bg: var(--white);
  --input-border: rgba(14, 16, 19, 0.18);
  --dev-glow-a: rgba(122, 98, 51, 0.25);
  --dev-glow-b: rgba(31, 42, 107, 0.2);
  --dev-border: rgba(14, 16, 19, 0.08);
  --dev-bg: rgba(14, 16, 19, 0.02);
  --dev-text: var(--neutral-900);
  color-scheme: light;
}

@media (min-width: 48em) {
  :root { --container-pad: var(--space-lg); }
}
@media (min-width: 64em) {
  :root { --container-pad: var(--space-xl); }
}
@media (min-width: 90em) {
  :root { --container-pad: var(--space-2xl); }
}

/* §8: reduced motion collapses every animation globally */
@media (prefers-reduced-motion: reduce) {
  :root {
    --duration-fast: 0.01ms;
    --duration-normal: 0.01ms;
    --duration-slow: 0.01ms;
    --duration-reveal: 0.01ms;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}