/* ═══════════════════════════════════════════════════════════════════════════
   TrueSmith Jeweler — Brand Design System
   htmx-r edition | 2026
   ═══════════════════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;0,800;1,400;1,600&family=Inter:wght@300;400;500;600;700&display=swap');

/* ── Design Tokens ──────────────────────────────────────────────────────── */
:root {
  /* Brand palette */
  --gold:          #D4AF37;
  --gold-light:    #F4E4B8;
  --gold-dark:     #A08820;
  --gold-dim:      rgba(212, 175, 55, 0.15);
  --gold-mid:      rgba(212, 175, 55, 0.3);
  --gold-glow:     rgba(212, 175, 55, 0.5);

  --black:         #000000;
  --surface:       #0a0a0a;
  --surface-2:     #141414;
  --surface-3:     #1a1a1a;
  --surface-4:     #222222;

  --text:          #F5F5F5;
  --text-muted:    #888888;
  --text-faint:    #444444;

  /* Typography */
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans:  'Inter', -apple-system, sans-serif;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  /* Radii */
  --radius-sm: 0.375rem;
  --radius:    0.625rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-luxury:    0 4px 24px rgba(0,0,0,0.6), 0 1px 4px rgba(0,0,0,0.4);
  --shadow-gold-glow: 0 0 20px rgba(212,175,55,0.35), 0 0 60px rgba(212,175,55,0.1);
  --shadow-card:      0 2px 12px rgba(0,0,0,0.5);

  /* Transitions */
  --ease-luxury: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-snap:   cubic-bezier(0.34, 1.56, 0.64, 1);
  --dur-fast:    150ms;
  --dur-base:    300ms;
  --dur-slow:    600ms;

  /* Nav height */
  --nav-h: 5rem;
}

/* ── Reset & Base ────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  background: var(--black);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.2;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { cursor: pointer; font-family: inherit; }

/* Scrollbar */
::-webkit-scrollbar       { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--surface-3); }
::-webkit-scrollbar-thumb { background: var(--surface-4); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--gold); }

/* Focus */
:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }

/* ── Layout Utilities ────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

@media (max-width: 640px) { .container { padding: 0 var(--space-4); } }

.section { padding: var(--space-24) 0; }
.section--sm { padding: var(--space-12) 0; }

/* ── Glass morphism ──────────────────────────────────────────────────────── */
.glass {
  background: rgba(14, 14, 14, 0.72);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border: 1px solid var(--gold-dim);
}

.glass--heavy {
  background: rgba(8, 8, 8, 0.88);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}

/* ── Gold text gradient ──────────────────────────────────────────────────── */
.text-gold {
  background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 50%, var(--gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gold--static { color: var(--gold); }

/* ── Backgrounds ─────────────────────────────────────────────────────────── */
.bg-luxury  { background: linear-gradient(135deg, var(--black) 0%, var(--surface-3) 50%, var(--black) 100%); }
.bg-surface { background: var(--surface-2); }
.bg-gold    { background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 50%, var(--gold) 100%); }

/* ── Cards ───────────────────────────────────────────────────────────────── */
.card {
  background: var(--surface-2);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--dur-base) var(--ease-luxury),
              transform var(--dur-base) var(--ease-luxury),
              box-shadow var(--dur-base) var(--ease-luxury);
}
.card:hover {
  border-color: var(--gold-mid);
  transform: translateY(-3px);
  box-shadow: var(--shadow-luxury);
}

.card--interactive {
  cursor: pointer;
}

.card--selected {
  border-color: var(--gold) !important;
  background: rgba(212, 175, 55, 0.06) !important;
  box-shadow: inset 0 0 0 1px var(--gold), var(--shadow-gold-glow) !important;
  animation: card-press 200ms ease;
}
@keyframes card-press {
  0%   { transform: scale(1); }
  40%  { transform: scale(0.97); }
  100% { transform: scale(1); }
}

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.9375rem;
  letter-spacing: 0.02em;
  border: none;
  transition: transform var(--dur-fast) var(--ease-snap),
              box-shadow var(--dur-base),
              background var(--dur-fast);
  cursor: pointer;
  white-space: nowrap;
}

.btn:active { transform: scale(0.97) !important; }

.btn--primary {
  background: var(--gold);
  color: var(--black);
}
.btn--primary:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-gold-glow);
}

.btn--outline {
  background: transparent;
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.2);
}
.btn--outline:hover {
  border-color: var(--gold);
  color: var(--gold);
}

.btn--gold-outline {
  background: transparent;
  color: var(--gold);
  border: 1px solid var(--gold-mid);
}
.btn--gold-outline:hover {
  background: var(--gold-dim);
  border-color: var(--gold);
}

.btn--ghost {
  background: transparent;
  color: var(--text-muted);
  border: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius);
}
.btn--ghost:hover { background: rgba(255,255,255,0.06); color: var(--text); }

.btn--sm { padding: var(--space-2) var(--space-4); font-size: 0.875rem; }
.btn--lg { padding: var(--space-4) var(--space-8); font-size: 1.0625rem; }

.btn--loading { opacity: 0.75; pointer-events: none; cursor: not-allowed; }
.btn--loading::after {
  content: '';
  display: inline-block;
  width: 0.75em; height: 0.75em;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: btn-spin 0.6s linear infinite;
  margin-left: 0.5em;
  vertical-align: -0.1em;
}
@keyframes btn-spin { to { transform: rotate(360deg); } }

/* ── Form inputs ─────────────────────────────────────────────────────────── */
.input {
  width: 100%;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  padding: var(--space-3) var(--space-4);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  transition: border-color var(--dur-fast);
}
.input:focus {
  outline: none;
  border-color: var(--gold);
  background: rgba(212,175,55,0.04);
}
.input::placeholder { color: var(--text-faint); }

.input--serif {
  font-family: var(--font-serif);
  font-style: italic;
  letter-spacing: 0.02em;
}

.label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-2);
}

/* ── Navigation ──────────────────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  transition: background var(--dur-base), border-color var(--dur-base);
}

.nav.scrolled {
  background: rgba(0,0,0,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--gold-dim);
}

/* htmx-r: nav scroll state */
[data-state-scroll="true"] .nav,
.nav[data-state-scroll="true"] {
  background: rgba(0,0,0,0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--gold-dim);
}

.nav__inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-serif);
  font-size: 1.375rem;
  font-weight: 700;
  flex-shrink: 0;
}

.nav__logo svg { transition: transform var(--dur-slow) var(--ease-luxury); }
.nav__logo:hover svg { transform: rotate(180deg); }

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

.nav__link {
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--text);
  position: relative;
  padding: var(--space-1) 0;
  transition: color var(--dur-fast);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 1.5px;
  background: var(--gold);
  transition: width var(--dur-base) var(--ease-luxury);
}

.nav__link:hover,
.nav__link.active { color: var(--gold); }
.nav__link.active::after,
.nav__link:hover::after { width: 100%; }

/* ── Hero ────────────────────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: calc(var(--nav-h) + var(--space-8)) var(--space-6) var(--space-16);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  transform: scale(1.05);
  will-change: transform;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,0.65) 0%, rgba(0,0,0,0.35) 50%, var(--black) 100%);
}

.hero__content { position: relative; z-index: 1; max-width: 800px; }

.hero__eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: var(--space-4);
}

.hero__title {
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 800;
  margin-bottom: var(--space-6);
  line-height: 1.05;
}

.hero__sub {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: rgba(255,255,255,0.75);
  max-width: 520px;
  margin: 0 auto var(--space-10);
  line-height: 1.65;
}

.hero__actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Trust strip ─────────────────────────────────────────────────────────── */
.trust-strip {
  display: flex;
  gap: var(--space-8);
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  padding: var(--space-6) 0;
  border-top: 1px solid rgba(255,255,255,0.06);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.trust-strip__item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.875rem;
  color: var(--text-muted);
}

.trust-strip__icon { color: var(--gold); flex-shrink: 0; }

/* ── Feature tiles ───────────────────────────────────────────────────────── */
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: var(--space-6); }

.tile {
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  text-align: center;
  border: 1px solid rgba(255,255,255,0.05);
  background: var(--surface-2);
  transition: border-color var(--dur-base), transform var(--dur-base);
}
.tile:hover { border-color: var(--gold-mid); transform: translateY(-4px); }
.tile__icon { color: var(--gold); margin: 0 auto var(--space-6); }
.tile__title { font-size: 1.125rem; margin-bottom: var(--space-3); color: var(--text); }
.tile__desc { font-size: 0.9375rem; color: var(--text-muted); line-height: 1.65; }

/* ── Section headings ────────────────────────────────────────────────────── */
.section-head { text-align: center; margin-bottom: var(--space-16); }
.section-head__pre {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: var(--space-3);
}
.section-head__title { font-size: clamp(1.75rem, 4vw, 3rem); margin-bottom: var(--space-4); }
.section-head__sub { font-size: 1.0625rem; color: var(--text-muted); max-width: 540px; margin: 0 auto; }

/* ── Diamond grid ────────────────────────────────────────────────────────── */
.diamond-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--space-6); }

.diamond-card { cursor: pointer; }
.diamond-card__img { position: relative; aspect-ratio: 4/3; overflow: hidden; background: var(--surface-3); }
.diamond-card__img img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--dur-slow) var(--ease-luxury); }
.diamond-card:hover .diamond-card__img img { transform: scale(1.05); }
.diamond-card__badge {
  position: absolute; top: var(--space-3); right: var(--space-3);
  background: rgba(0,0,0,0.75);
  border: 1px solid var(--gold-mid);
  color: var(--gold);
  font-size: 0.75rem;
  font-weight: 600;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  letter-spacing: 0.04em;
}
.diamond-card__body { padding: var(--space-4) var(--space-5); }
.diamond-card__name { font-size: 1.0625rem; font-weight: 700; margin-bottom: var(--space-1); }
.diamond-card__specs { font-size: 0.875rem; color: var(--text-muted); margin-bottom: var(--space-3); }
.diamond-card__price { font-size: 1.25rem; font-weight: 700; color: var(--gold); }

/* ── Ring builder stepper ────────────────────────────────────────────────── */
.stepper { display: flex; align-items: center; gap: var(--space-2); overflow-x: auto; padding-bottom: var(--space-2); }

.step-dot {
  flex-shrink: 0;
  width: 2.5rem; height: 2.5rem;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.875rem; font-weight: 700;
  transition: all var(--dur-base);
  cursor: default;
}
.step-dot--done     { background: rgba(212,175,55,0.2); color: var(--gold); cursor: pointer; }
.step-dot--active   { background: var(--gold); color: var(--black); box-shadow: 0 0 0 4px rgba(212,175,55,0.25); }
.step-dot--pending  { background: var(--surface-3); color: var(--text-faint); }

.step-line { flex: 1; height: 1px; min-width: 1rem; background: var(--surface-4); transition: background var(--dur-base); }
.step-line--done { background: var(--gold); }

.step-label        { font-size: 0.75rem; color: var(--text-muted); margin-top: var(--space-2); text-align: center; white-space: nowrap; }
.step-label--done  { color: var(--gold); }
.step-label--active { color: var(--gold); font-weight: 600; }

/* ── Summary sidebar ─────────────────────────────────────────────────────── */
.summary { padding: var(--space-6); border-radius: var(--radius-lg); }
.summary__title { font-size: 1.125rem; font-family: var(--font-serif); margin-bottom: var(--space-6); }
.summary__row { display: flex; justify-content: space-between; gap: var(--space-4); padding: var(--space-3) 0; border-bottom: 1px solid rgba(255,255,255,0.06); }
.summary__row:last-of-type { border-bottom: none; }
.summary__label { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; }
.summary__value { font-size: 0.9375rem; font-weight: 500; }
.summary__price { color: var(--gold); font-weight: 700; }
.summary__total { font-size: 1.5rem; font-weight: 800; }

/* ── 3D viewer container ─────────────────────────────────────────────────── */
.viewer-3d {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  min-height: 300px;
  max-height: 540px;
  background: linear-gradient(160deg, var(--surface-2) 0%, var(--black) 100%);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gold-dim);
  overflow: hidden;
}

.viewer-3d canvas { width: 100% !important; height: 100% !important; }

.viewer-3d__progress {
  position: absolute; top: 0; left: 0; right: 0;
  height: 2px; background: rgba(255,255,255,0.06); z-index: 5;
}
.viewer-3d__progress-bar {
  height: 100%; background: var(--gold);
  transition: width 400ms var(--ease-luxury);
}

.viewer-3d__badge {
  position: absolute; top: var(--space-3); left: var(--space-3);
  z-index: 5;
  display: flex; align-items: center; gap: var(--space-2);
  background: rgba(0,0,0,0.65); backdrop-filter: blur(12px);
  border: 1px solid var(--gold-dim);
  border-radius: var(--radius-full);
  padding: var(--space-1) var(--space-3);
  font-size: 0.75rem; color: var(--gold); font-weight: 500;
}

.viewer-3d__score {
  position: absolute; top: var(--space-3); right: var(--space-3);
  z-index: 5;
  background: rgba(0,0,0,0.65); backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-full);
  padding: var(--space-1) var(--space-3);
  font-size: 0.75rem; color: var(--text-muted);
}

.viewer-3d__meta {
  position: absolute; bottom: 0; left: 0; right: 0;
  z-index: 5;
  padding: var(--space-3) var(--space-4);
  background: rgba(0,0,0,0.65); backdrop-filter: blur(12px);
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 0.75rem; color: var(--text-muted); text-align: center;
}

/* htmx-r: 3D viewer stage states */
[data-state-stage="billboard"]      .viewer-3d__canvas-layer { display: none; }
[data-state-stage="complete"]       .viewer-3d__progress { opacity: 0; }
[data-state-stage="error"]          .viewer-3d__error { display: flex !important; }

/* ── AR overlay ──────────────────────────────────────────────────────────── */
.ar-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: var(--black);
  display: none; /* shown by htmx-r state: [data-state-ar="open"] */
}
.ar-overlay[data-state-ar="open"] { display: flex; flex-direction: column; }

/* ── Toast ───────────────────────────────────────────────────────────────── */
.toast-container {
  position: fixed; bottom: var(--space-6); right: var(--space-6);
  z-index: 300; display: flex; flex-direction: column; gap: var(--space-3);
  max-width: 360px;
}

.toast {
  display: flex; align-items: center; gap: var(--space-3);
  background: var(--surface-3); border: 1px solid var(--gold-dim);
  border-radius: var(--radius-lg); padding: var(--space-4);
  box-shadow: var(--shadow-luxury);
  animation: toast-in 300ms var(--ease-snap) forwards;
}

@keyframes toast-in {
  from { opacity: 0; transform: translateX(100%); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ── Modals ──────────────────────────────────────────────────────────────── */
.modal-backdrop {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
  padding: var(--space-4);
  opacity: 0; pointer-events: none;
  transition: opacity var(--dur-base);
}
.modal-backdrop.open { opacity: 1; pointer-events: all; }

.modal {
  background: var(--surface-2);
  border: 1px solid var(--gold-dim);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  width: 100%; max-width: 480px;
  transform: translateY(12px) scale(0.98);
  transition: transform var(--dur-base) var(--ease-luxury);
}
.modal-backdrop.open .modal { transform: none; }

/* ── Carousel ────────────────────────────────────────────────────────────── */
.carousel { position: relative; overflow: hidden; }
.carousel__track { display: flex; gap: var(--space-6); transition: transform 400ms var(--ease-luxury); }
.carousel__slide { flex-shrink: 0; width: 280px; }
.carousel__nav { display: flex; gap: var(--space-2); justify-content: center; margin-top: var(--space-6); }
.carousel__dot { width: 8px; height: 8px; border-radius: 50%; background: var(--surface-4); border: none; cursor: pointer; transition: background var(--dur-fast), transform var(--dur-fast); }
.carousel__dot.active { background: var(--gold); transform: scale(1.3); }

/* ── Filter pills ────────────────────────────────────────────────────────── */
.pills { display: flex; gap: var(--space-2); flex-wrap: wrap; }
.pill {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: 0.8125rem; font-weight: 500;
  border: 1px solid rgba(255,255,255,0.1);
  background: transparent; color: var(--text-muted);
  cursor: pointer;
  transition: all var(--dur-fast);
}
.pill:hover { border-color: var(--gold-mid); color: var(--text); }
.pill.active { border-color: var(--gold); background: var(--gold-dim); color: var(--gold); }

/* ── Footer ──────────────────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: var(--space-16) 0 var(--space-8);
  background: var(--surface);
}
.footer__grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--space-8); margin-bottom: var(--space-12); }
@media (max-width: 768px) { .footer__grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer__grid { grid-template-columns: 1fr; } }

.footer__logo { font-family: var(--font-serif); font-size: 1.375rem; font-weight: 700; margin-bottom: var(--space-4); }
.footer__desc { font-size: 0.9375rem; color: var(--text-muted); line-height: 1.65; max-width: 280px; }
.footer__heading { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.12em; color: var(--text-muted); margin-bottom: var(--space-4); }
.footer__link { display: block; font-size: 0.9375rem; color: var(--text-muted); padding: var(--space-1) 0; transition: color var(--dur-fast); }
.footer__link:hover { color: var(--gold); }
.footer__bottom { border-top: 1px solid rgba(255,255,255,0.06); padding-top: var(--space-6); display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--space-4); font-size: 0.875rem; color: var(--text-muted); }

/* ── Animation utilities ─────────────────────────────────────────────────── */
.animate-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 600ms var(--ease-luxury), transform 600ms var(--ease-luxury);
}
.animate-in.visible { opacity: 1; transform: none; }

@keyframes spin   { to { transform: rotate(360deg); } }
@keyframes pulse  { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }
@keyframes shimmer { to { background-position: -200% 0; } }

.animate-spin   { animation: spin 1s linear infinite; }
.animate-pulse  { animation: pulse 2s ease-in-out infinite; }

/* Skeleton loading */
.skeleton {
  background: linear-gradient(90deg, var(--surface-2) 25%, var(--surface-3) 50%, var(--surface-2) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius);
}

/* ── htmx-r reactive state selectors ────────────────────────────────────── */

/* Mobile menu */
[data-state-menu="open"] .nav__mobile  { transform: translateX(0) !important; }
[data-state-menu="open"] .nav__backdrop { opacity: 1 !important; pointer-events: all !important; }

/* ── Search overlay ─────────────────────────────────────────────────────── */
.search-overlay {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  max-height: 80vh; overflow-y: auto;
  background: var(--surface);
  border-bottom: 1px solid var(--gold-dim);
  transform: translateY(-100%);
  transition: transform 300ms var(--ease-luxury);
}
.search-overlay__inner {
  max-width: 680px; margin: 0 auto;
  padding: calc(var(--nav-h) + var(--space-6)) var(--space-6) var(--space-8);
}
.search-backdrop {
  position: fixed; inset: 0; z-index: 199;
  background: rgba(0,0,0,0.6); backdrop-filter: blur(4px);
  opacity: 0; pointer-events: none; transition: opacity 300ms;
}
[data-state-search="open"] .search-overlay   { transform: translateY(0); }
[data-state-search="open"] .search-backdrop  { opacity: 1; pointer-events: all; }
.search-hit {
  display: flex; gap: var(--space-4); align-items: center;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius);
  transition: background 150ms;
  text-decoration: none; color: inherit;
}
.search-hit:hover { background: var(--surface-2); }
.search-hit__badge {
  font-size: 0.625rem; font-weight: 700; letter-spacing: 0.15em;
  text-transform: uppercase; color: var(--gold); white-space: nowrap;
}

/* Build step visibility — htmx handles re-render, these just animate */
.build-step { animation: step-in 250ms var(--ease-luxury) forwards; }
@keyframes step-in {
  from { opacity: 0; transform: translateX(12px); }
  to   { opacity: 1; transform: none; }
}
/* Step exit animation — plays while htmx is swapping out old content */
#build-content.htmx-swapping .build-step {
  animation: step-out 150ms ease forwards;
}
@keyframes step-out {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(-8px) translateY(4px); }
}

/* ── Responsive tweaks ───────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .nav__links { display: none; }
  .hero__title { font-size: clamp(2rem, 8vw, 3.5rem); }
  /* Show hamburger, hide desktop icon row */
  .nav__icons { display: none !important; }
  #nav-toggle { display: flex !important; align-items: center; }
  /* Icon swap when drawer is open */
  [data-state-menu="open"] #menu-icon-open  { display: none; }
  [data-state-menu="open"] #menu-icon-close { display: inline !important; }
}

@media (max-width: 640px) {
  .section { padding: var(--space-16) 0; }
  .hero { min-height: 90svh; }
  .tiles { grid-template-columns: 1fr; }
  .diamond-grid { grid-template-columns: 1fr; }
  .hero__actions { flex-direction: column; align-items: center; }
  .btn--lg { width: 100%; max-width: 340px; }
  /* Stepper: hide labels, shrink dots to fit 6 steps across */
  .step-label { display: none; }
  .step-dot   { width: 1.625rem; height: 1.625rem; font-size: 0.6875rem; }
  .step-line  { min-width: 0.5rem; max-width: 2rem; }
}

/* ── Accessibility ────────────────────────────────────────────────────────── */
.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.skip-link:focus {
  position: fixed;
  top: var(--space-4);
  left: var(--space-4);
  width: auto;
  height: auto;
  padding: var(--space-3) var(--space-5);
  background: var(--gold);
  color: var(--black);
  font-weight: 700;
  font-size: 0.875rem;
  border-radius: var(--radius);
  z-index: 9999;
  overflow: visible;
  text-decoration: none;
}