/**
 * Van Phuc Heritage — Design System Tokens & Core Primitives
 * Editorial Heritage Luxury (Thuan Viet Phang Sang, Zero Neon, Max Card Radius 16px)
 */

:root {
  /* Core Surfaces */
  --vp-bg: #FAF7F2;
  --vp-surface: #FFFFFF;
  --vp-surface-alt: #F3EFE6;
  --vp-surface-warm: #EBE4D5;

  /* Heritage Brand Accents */
  --vp-crimson: #991B1B;
  --vp-crimson-hover: #7F1D1D;
  --vp-crimson-soft: rgba(153, 27, 27, 0.08);
  --vp-gold: #B45309;
  --vp-gold-ink: #92400E;
  --vp-gold-soft: #FEF3C7;
  --vp-jade: #065F46;
  --vp-jade-hover: #044E3A;
  --vp-jade-soft: #ECFDF5;

  /* Editorial Ink & WCAG AA Text Hierarchy */
  --vp-ink: #1C1917;
  --vp-body: #3F3F46;
  --vp-muted: #5F5F69;

  /* Borders & Elevation */
  --vp-border: rgba(28, 25, 23, 0.09);
  --vp-border-strong: rgba(28, 25, 23, 0.16);
  --vp-shadow-sm: 0 6px 20px -8px rgba(28, 25, 23, 0.07);
  --vp-shadow-md: 0 14px 34px -12px rgba(28, 25, 23, 0.11);

  /* Radii (Max 16px on cards & containers; pill reserved for buttons/badges) */
  --vp-radius-lg: 16px;
  --vp-radius-md: 12px;
  --vp-radius-sm: 8px;
  --vp-radius-pill: 9999px;

  /* Layout Metrics & Typography */
  --vp-container: 1280px;
  --vp-header-h: 72px;
  --vp-mobile-bar-h: 60px;
  --vp-font: 'Be Vietnam Pro', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

/* Cross-Document View Transitions (Motion-Safe) */
@media (prefers-reduced-motion: no-preference) {
  @view-transition {
    navigation: auto;
  }

  html {
    scroll-behavior: smooth;
  }
}

/* Base Document Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

html,
body {
  font-family: var(--vp-font);
  font-size-adjust: from-font;
  background: var(--vp-bg);
  color: var(--vp-body);
  margin: 0;
  padding: 0;
  inline-size: 100%;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

:target {
  scroll-margin-top: 5.5rem;
}

/* Accessible Keyboard Focus Ring */
:focus-visible {
  outline: 2px solid var(--vp-crimson);
  outline-offset: 2px;
}

@media (forced-colors: active) {
  :focus-visible {
    outline: 2px solid Highlight;
  }
}

/* Typography Defaults */
h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--vp-ink);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.015em;
  margin-block: 0 0.65em;
  text-wrap: balance;
}

p {
  margin-block: 0 1em;
}

a {
  color: var(--vp-crimson);
  text-underline-offset: 0.2em;
  transition: color 0.16s ease;
}

a:hover {
  color: var(--vp-crimson-hover);
}

img,
picture,
video,
canvas {
  display: block;
  max-inline-size: 100%;
  block-size: auto;
}

button,
input,
select,
textarea {
  font-family: inherit;
  font-size: 100%;
  color: inherit;
}

/* Prevent Background Scroll Chaining Under Native Modal Dialogs */
dialog:modal {
  overscroll-behavior: contain;
}

dialog::backdrop {
  overflow: hidden;
  overscroll-behavior: contain;
}

[inert],
[inert] * {
  opacity: 0.55;
  user-select: none;
}

/* Visually Hidden Utility (Screen-Reader Accessible, Focus-Reveal Safe) */
.vp-sr-only:where(:not(:focus-within, :active)),
.screen-reader-text:where(:not(:focus-within, :active)) {
  position: absolute;
  clip-path: inset(50%);
  overflow: hidden;
  inline-size: 1px;
  block-size: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  white-space: nowrap;
}

/* Shared Container Primitive */
.vp-container {
  inline-size: 100%;
  max-inline-size: var(--vp-container);
  margin-inline: auto;
  padding-inline: clamp(16px, 3dvw, 32px);
}

/* Shared Tactile Button System (WCAG 2.5.8 >= 44px Tap Target) */
.vp-btn {
  min-block-size: 44px;
  padding-inline: 20px;
  padding-block: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--vp-radius-pill);
  font-family: var(--vp-font);
  font-size: 0.9375rem;
  line-height: 1.25;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, transform 0.15s ease;
}

.vp-btn svg {
  flex-shrink: 0;
}

.vp-btn:active {
  transform: translateY(1px);
}

.vp-btn--primary {
  background: var(--vp-crimson);
  color: #FFFFFF;
  box-shadow: 0 6px 18px -6px rgba(153, 27, 27, 0.38);
}

.vp-btn--primary:hover {
  background: var(--vp-crimson-hover);
  color: #FFFFFF;
}

.vp-btn--secondary {
  background: var(--vp-surface);
  color: var(--vp-ink);
  border-color: var(--vp-border-strong);
}

.vp-btn--secondary:hover {
  background: var(--vp-surface-alt);
  color: var(--vp-crimson);
  border-color: rgba(153, 27, 27, 0.25);
}

.vp-btn--gold {
  background: var(--vp-gold-soft);
  color: var(--vp-gold-ink);
  border-color: rgba(180, 83, 9, 0.22);
}

.vp-btn--gold:hover {
  background: #FDE68A;
  color: #78350F;
}

.vp-btn--jade {
  background: var(--vp-jade);
  color: #FFFFFF;
  box-shadow: 0 6px 18px -6px rgba(6, 95, 70, 0.34);
}

.vp-btn--jade:hover {
  background: var(--vp-jade-hover);
  color: #FFFFFF;
}

.vp-btn--sm {
  padding-inline: 15px;
  padding-block: 8px;
  font-size: 0.875rem;
}

.vp-btn--full {
  inline-size: 100%;
}

/* Shared Badge Pill System */
.vp-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: var(--vp-radius-pill);
  padding: 5px 12px;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.3;
  background: var(--vp-surface-alt);
  color: var(--vp-ink);
  border: 1px solid var(--vp-border);
}

.vp-badge svg {
  flex-shrink: 0;
}

.vp-badge--crimson {
  background: var(--vp-crimson-soft);
  color: var(--vp-crimson);
  border-color: rgba(153, 27, 27, 0.16);
}

.vp-badge--gold {
  background: var(--vp-gold-soft);
  color: var(--vp-gold-ink);
  border-color: rgba(180, 83, 9, 0.22);
}

.vp-badge--jade {
  background: var(--vp-jade-soft);
  color: var(--vp-jade);
  border-color: rgba(6, 95, 70, 0.18);
}

/* Shared Equal-Height Bento Grid */
.vp-bento-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 272px), 1fr));
  gap: clamp(16px, 2.2dvw, 24px);
  align-items: stretch;
}

.vp-bento-grid > * {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  block-size: 100%;
  min-inline-size: 0;
}