/**
 * EKM OS Premium Design System — Foundation (2026-06-25)
 * Direction: Apple / Linear / Arc / Attio / Stripe — calm, executive, software-first.
 * Principles: 50% less visual noise · typography over boxes · restrained gold + emerald.
 *
 * Usage: link from index.html. Tokens are --ds-* ; bridge vars optional per rollout phase.
 * POC surface (this pass): top navigation (.hp-topnav).
 */

/* =============================================================================
   1. COLOR — restrained gold + emerald, calm surfaces
   ============================================================================= */
:root {
  /* Gold — accent only, never dominant */
  --ds-gold: #B8A067;
  --ds-gold-bright: #C9A227;
  --ds-gold-muted: rgba(184, 160, 103, 0.14);
  --ds-gold-subtle: rgba(184, 160, 103, 0.06);
  --ds-gold-ink: #1A1A1A;

  /* Emerald — success / positive signal */
  --ds-emerald: #3D6B4F;
  --ds-emerald-bright: #4A8260;
  --ds-emerald-muted: rgba(61, 107, 79, 0.12);
  --ds-emerald-subtle: rgba(61, 107, 79, 0.06);

  /* Neutrals — warm greige, not clinical gray */
  --ds-ink: #141414;
  --ds-ink-secondary: #3A3834;
  --ds-ink-tertiary: #6B6560;
  --ds-ink-faint: #8A857C;

  --ds-surface-page: #EBE9E4;
  --ds-surface-raised: #F5F3EF;
  --ds-surface-overlay: rgba(245, 243, 239, 0.92);
  --ds-surface-inverse: #0C0C0E;

  /* Semantic bridges (optional rollout — do not force globally yet) */
  --ds-danger: #B84A38;
  --ds-warn: #A67C3D;

  /* =============================================================================
     2. TYPOGRAPHY — larger, premium scale
     ============================================================================= */
  --ds-font-display: 'Cormorant Garamond', 'DM Serif Display', Georgia, serif;
  --ds-font-ui: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --ds-font-metrics: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --ds-weight-regular: 400;
  --ds-weight-medium: 500;
  --ds-weight-semibold: 600;

  /* Type scale — ~15% larger body, generous display */
  --ds-type-display: clamp(2rem, 3.5vw, 2.75rem);
  --ds-type-title: clamp(1.375rem, 2vw, 1.625rem);
  --ds-type-subtitle: clamp(1.0625rem, 1.4vw, 1.1875rem);
  --ds-type-body: 0.9375rem;       /* 15px — up from 13px */
  --ds-type-body-sm: 0.8125rem;    /* 13px */
  --ds-type-nav: 0.875rem;         /* 14px — up from 13px */
  --ds-type-caption: 0.75rem;      /* 12px — up from 11px */
  --ds-type-eyebrow: 0.6875rem;    /* 11px */
  --ds-type-kpi: clamp(1.5rem, 2.8vw, 2.25rem);

  --ds-leading-tight: 1.15;
  --ds-leading-normal: 1.55;
  --ds-leading-relaxed: 1.7;

  --ds-tracking-tight: -0.01em;
  --ds-tracking-normal: 0;
  --ds-tracking-wide: 0.08em;
  --ds-tracking-eyebrow: 0.14em;

  /* =============================================================================
     3. SPACING — more whitespace (4px base)
     ============================================================================= */
  --ds-space-1: 0.25rem;   /* 4px */
  --ds-space-2: 0.5rem;    /* 8px */
  --ds-space-3: 0.75rem;   /* 12px */
  --ds-space-4: 1rem;      /* 16px */
  --ds-space-5: 1.25rem;   /* 20px */
  --ds-space-6: 1.5rem;    /* 24px */
  --ds-space-8: 2rem;      /* 32px */
  --ds-space-10: 2.5rem;   /* 40px */
  --ds-space-12: 3rem;     /* 48px */
  --ds-space-16: 4rem;     /* 64px */

  --ds-gutter: clamp(1.25rem, 4.5vw, 3.5rem);
  --ds-content-max: 1680px;

  /* =============================================================================
     4. DEPTH — subtle shadows, reduced borders
     ============================================================================= */
  --ds-radius-sm: 8px;
  --ds-radius-md: 12px;
  --ds-radius-lg: 16px;
  --ds-radius-xl: 20px;
  --ds-radius-full: 9999px;

  --ds-border-hairline: 0.5px solid rgba(20, 20, 20, 0.08);
  --ds-border-none: none;

  --ds-shadow-xs: 0 1px 2px rgba(20, 20, 20, 0.04);
  --ds-shadow-sm: 0 2px 8px rgba(20, 20, 20, 0.05);
  --ds-shadow-md: 0 8px 24px rgba(20, 20, 20, 0.06);
  --ds-shadow-lg: 0 16px 48px rgba(20, 20, 20, 0.08);
  --ds-shadow-nav: 0 1px 0 rgba(20, 20, 20, 0.04);

  --ds-transition-fast: 0.12s ease;
  --ds-transition-base: 0.18s ease;
}

/* Dark mode token overrides */
html[data-dark] {
  --ds-ink: #F0EBE3;
  --ds-ink-secondary: #D4CFC6;
  --ds-ink-tertiary: #A8A299;
  --ds-ink-faint: #8A857C;

  --ds-surface-page: #0E0E10;
  --ds-surface-raised: #161618;
  --ds-surface-overlay: rgba(22, 22, 24, 0.94);

  --ds-gold-muted: rgba(201, 162, 39, 0.16);
  --ds-gold-subtle: rgba(201, 162, 39, 0.06);
  --ds-emerald-muted: rgba(156, 203, 110, 0.14);

  --ds-border-hairline: 0.5px solid rgba(255, 255, 255, 0.06);
  --ds-shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.2);
  --ds-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.24);
  --ds-shadow-md: 0 8px 24px rgba(0, 0, 0, 0.28);
  --ds-shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.32);
  --ds-shadow-nav: 0 1px 0 rgba(255, 255, 255, 0.04);
}

/* =============================================================================
   5. PATTERN — Card (minimal, typography-led)
   ============================================================================= */
.ds-card {
  background: var(--ds-surface-raised);
  border: var(--ds-border-none);
  border-radius: var(--ds-radius-lg);
  padding: var(--ds-space-6) var(--ds-space-6);
  box-shadow: var(--ds-shadow-sm);
  transition: box-shadow var(--ds-transition-base);
}

.ds-card:hover {
  box-shadow: var(--ds-shadow-md);
}

.ds-card--flat {
  box-shadow: none;
  background: transparent;
  padding: var(--ds-space-4) 0;
}

.ds-card__title {
  font-family: var(--ds-font-display);
  font-size: var(--ds-type-title);
  font-weight: var(--ds-weight-regular);
  letter-spacing: var(--ds-tracking-tight);
  color: var(--ds-ink);
  line-height: var(--ds-leading-tight);
  margin: 0 0 var(--ds-space-3);
}

.ds-card__body {
  font-family: var(--ds-font-ui);
  font-size: var(--ds-type-body);
  line-height: var(--ds-leading-normal);
  color: var(--ds-ink-secondary);
}

/* =============================================================================
   6. PATTERN — Empty state (calm, one line + optional action)
   ============================================================================= */
.ds-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--ds-space-12) var(--ds-space-6);
  gap: var(--ds-space-3);
}

.ds-empty__label {
  font-family: var(--ds-font-ui);
  font-size: var(--ds-type-body);
  font-weight: var(--ds-weight-medium);
  color: var(--ds-ink-secondary);
  letter-spacing: var(--ds-tracking-normal);
}

.ds-empty__hint {
  font-family: var(--ds-font-ui);
  font-size: var(--ds-type-body-sm);
  color: var(--ds-ink-tertiary);
  max-width: 28rem;
  line-height: var(--ds-leading-relaxed);
}

/* =============================================================================
   7. PATTERN — Primary action (one obvious CTA per screen)
   ============================================================================= */
.ds-btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--ds-space-2);
  font-family: var(--ds-font-ui);
  font-size: var(--ds-type-body-sm);
  font-weight: var(--ds-weight-medium);
  letter-spacing: var(--ds-tracking-wide);
  text-transform: none;
  color: var(--ds-gold-ink);
  background: var(--ds-gold-bright);
  border: none;
  border-radius: var(--ds-radius-full);
  padding: var(--ds-space-3) var(--ds-space-6);
  cursor: pointer;
  box-shadow: var(--ds-shadow-xs);
  transition: opacity var(--ds-transition-fast), box-shadow var(--ds-transition-base), transform var(--ds-transition-fast);
}

.ds-btn-primary:hover {
  opacity: 0.92;
  box-shadow: var(--ds-shadow-sm);
}

.ds-btn-primary:active {
  transform: scale(0.98);
}

.ds-btn-primary:focus-visible {
  outline: 2px solid var(--ds-gold-bright);
  outline-offset: 2px;
}

html[data-dark] .ds-btn-primary {
  color: var(--ds-surface-inverse);
}

/* Secondary / ghost — never compete with primary */
.ds-btn-ghost {
  display: inline-flex;
  align-items: center;
  font-family: var(--ds-font-ui);
  font-size: var(--ds-type-body-sm);
  font-weight: var(--ds-weight-regular);
  color: var(--ds-ink-tertiary);
  background: transparent;
  border: var(--ds-border-none);
  border-radius: var(--ds-radius-full);
  padding: var(--ds-space-2) var(--ds-space-4);
  cursor: pointer;
  transition: color var(--ds-transition-fast);
}

.ds-btn-ghost:hover {
  color: var(--ds-ink);
}

/* =============================================================================
   8. POC — Top navigation (premium shell direction)
   Scoped to .hp-topnav only; does not reskin other surfaces.
   ============================================================================= */
.hp-topnav {
  padding-top: var(--ds-space-2);
  padding-bottom: var(--ds-space-2);
  border-bottom: var(--ds-border-none);
  box-shadow: var(--ds-shadow-nav);
  gap: var(--ds-space-4);
}

.hp-lockup {
  padding: var(--ds-space-4) 0;
}

.hp-lockup-mark {
  font-family: var(--ds-font-display);
  font-size: clamp(1.625rem, 2.8vw, 1.875rem);
  letter-spacing: 0.12em;
  font-weight: var(--ds-weight-regular);
  color: var(--ds-ink);
  line-height: var(--ds-leading-tight);
}

.hp-lockup-sub {
  font-family: var(--ds-font-ui);
  font-size: var(--ds-type-eyebrow);
  font-weight: var(--ds-weight-semibold);
  letter-spacing: var(--ds-tracking-eyebrow);
  color: var(--ds-ink-tertiary);
  margin-top: var(--ds-space-2);
  text-transform: uppercase;
}

/* Remove vertical rule — typography separation instead */
.hp-navdiv {
  display: none;
}

.hp-navpill {
  gap: var(--ds-space-1) var(--ds-space-2);
  padding-left: var(--ds-space-4);
}

.hp-navitem,
.hp-topnav .tab-btn {
  font-family: var(--ds-font-ui);
  font-size: var(--ds-type-nav);
  font-weight: var(--ds-weight-regular);
  letter-spacing: var(--ds-tracking-normal);
  color: var(--ds-ink-tertiary);
  padding: var(--ds-space-3) var(--ds-space-4);
  margin: var(--ds-space-2) var(--ds-space-1);
  border: var(--ds-border-none);
  border-radius: var(--ds-radius-sm);
  background: transparent;
  transition: color var(--ds-transition-base), background var(--ds-transition-fast);
}

.hp-navitem:hover,
.hp-topnav .tab-btn:hover:not(.active) {
  color: var(--ds-ink);
  background: var(--ds-gold-subtle);
}

.hp-navitem.active,
.hp-topnav .tab-btn.active {
  color: var(--ds-ink);
  font-weight: var(--ds-weight-medium);
  background: var(--ds-gold-muted);
  box-shadow: none;
}

/* Active indicator — restrained gold, not underline noise */
.hp-navitem.active::after,
.hp-topnav .tab-btn.active::after {
  content: none;
}

.hp-topnav-utils {
  gap: var(--ds-space-4);
  padding-left: var(--ds-space-6);
}

/* Theme-specific nav: inherit premium spacing, keep theme accent colors */
html[data-theme="modern_ekm"] .hp-topnav {
  border-bottom: var(--ds-border-none);
  box-shadow: var(--ds-shadow-nav);
}

html[data-theme="modern_ekm"] .hp-lockup-mark {
  color: var(--c-accent, var(--ds-gold-bright));
}

html[data-theme="modern_ekm"] .hp-navitem.active,
html[data-theme="modern_ekm"] .tab-btn.active {
  color: var(--c-accent, var(--ds-gold-bright));
  background: var(--ds-gold-subtle);
}

html[data-theme="knicks"] .hp-navitem.active,
html[data-theme="knicks"] .tab-btn.active,
html[data-theme="knicks_linen"] .hp-navitem.active,
html[data-theme="knicks_linen"] .tab-btn.active,
html[data-theme="nyc_premium"] .hp-navitem.active,
html[data-theme="nyc_premium"] .tab-btn.active {
  background: var(--ds-gold-subtle);
}

#main-content.nav-model-b-layout > .hp-topnav {
  border-bottom: var(--ds-border-none);
  box-shadow: var(--ds-shadow-nav);
}