@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600;9..144,700;9..144,800&family=DM+Sans:wght@400;500;600;700&display=swap');

:root {
  --bg:        #f4f6f5;
  --surface:   #ffffff;
  --surface2:  #ecefee;
  --border:    #d9dedc;
  --border2:   #c0c8c5;

  --text:      #0e1c20;
  --text2:     #36474c;
  --text3:     #6b7d80;
  --text4:     #9aa9ac;

  --accent:    #0d9488;
  --accent2:   #0e7490;
  --accent3:   #34d399;
  --accent-bg: #e6f5f3;
  --gold:      #b08a3e;
  --gold-bg:   #faf2dd;

  --font-ui:   'DM Sans', system-ui, sans-serif;
  --font-display: 'Fraunces', Georgia, serif;

  --r:    8px;
  --r-lg: 14px;
  --t:    180ms ease;

  --shadow-sm: 0 1px 3px rgba(13,28,32,0.06);
  --shadow:    0 4px 16px rgba(13,28,32,0.08);
  --shadow-lg: 0 16px 40px rgba(13,28,32,0.12);
}

[data-theme="dark"] {
  --bg:        #0b1216;
  --surface:   #131c20;
  --surface2:  #1a262c;
  --border:    rgba(255,255,255,0.08);
  --border2:   rgba(255,255,255,0.16);

  --text:      #e6edee;
  --text2:     #b9c5c8;
  --text3:     #8a9a9e;
  --text4:     #5b6b6f;

  --accent:    #34d399;
  --accent2:   #5eead4;
  --accent3:   #22d3ee;
  --accent-bg: rgba(52,211,153,0.10);
  --gold:      #e8c878;
  --gold-bg:   rgba(232,200,120,0.10);

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
  --shadow:    0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 16px 40px rgba(0,0,0,0.55);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  font-size: 16px;
  scroll-behavior: smooth;
  overflow-x: clip;
  max-width: 100%;
  background: var(--bg);
}
body {
  background: transparent;
  color: var(--text);
  font-family: var(--font-ui);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  max-width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: inherit; text-decoration: none; transition: color var(--t); }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text3); }

/* ─────────────── HEADER ─────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding: 12px 1.35rem;
  gap: 12px 1rem;
  max-width: 100%;
  min-width: 0;
  box-sizing: border-box;
}
.header-brand-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  min-width: 0;
}
.header-vsep {
  width: 1px;
  height: 30px;
  background: var(--border);
  flex-shrink: 0;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  min-width: 0;
}
.logo-mark {
  width: 40px;
  height: 40px;
  object-fit: contain;
  flex-shrink: 0;
  display: block;
  filter: drop-shadow(0 2px 6px rgba(13,148,136,0.25));
  border-radius: 8px;
}
.logo-wordmark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.18rem;
  letter-spacing: -0.015em;
  color: var(--text);
  white-space: nowrap;
}
.logo-wordmark em {
  font-style: italic;
  font-weight: 600;
  background: linear-gradient(120deg, var(--accent), var(--accent3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}
.header-nav a {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text2);
  padding: 7px 12px;
  border-radius: var(--r);
  transition: all var(--t);
  white-space: nowrap;
}
.header-nav a:hover { background: var(--surface2); color: var(--text); }
.header-nav a.active { color: var(--accent); background: var(--accent-bg); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  flex-shrink: 0;
}

/* lang switcher */
.lang-switch {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px;
  background: var(--surface2);
}
.lang-btn {
  font-family: var(--font-ui);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text3);
  transition: all var(--t);
}
.lang-btn.active {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.lang-btn:not(.active):hover { color: var(--text); }

/* theme toggle */
.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: 999px;
  background: var(--surface2);
  border: 1px solid var(--border);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text2);
  transition: all var(--t);
}
.theme-toggle:hover { color: var(--text); border-color: var(--border2); }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
.theme-toggle svg { width: 18px; height: 18px; }

/* ─────────────── HERO ─────────────── */
.hero {
  position: relative;
  isolation: isolate;
  background: transparent;
  border-bottom: 1px solid var(--border);
  padding: 4rem 1.5rem 3.5rem;
  text-align: center;
  max-width: 100%;
  box-sizing: border-box;
  overflow: visible;
}
.hero-decor {
  display: none;
}
/* Hero gem decorations via CSS */
.hero-gems {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.hero-gems svg {
  position: absolute;
}
.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 760px;
  margin: 0 auto;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent2);
  background: var(--accent-bg);
  padding: 6px 12px;
  border-radius: 999px;
  margin-bottom: 1.25rem;
}
.hero-eyebrow svg { width: 12px; height: 12px; }

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 4.6vw, 3.4rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text);
  line-height: 1.05;
  margin-bottom: 0.85rem;
}
.hero-title em {
  font-style: italic;
  font-weight: 600;
  background: linear-gradient(110deg, var(--accent3), var(--accent), var(--accent2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  font-size: 1.08rem;
  color: var(--text2);
  max-width: 540px;
  margin: 0 auto 1.75rem;
  line-height: 1.55;
}

.hero-search-wrap {
  position: relative;
  max-width: 560px;
  margin: 0 auto;
}
.hero-search-input {
  width: 100%;
  border: 1.5px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  padding: 14px 130px 14px 22px;
  font-family: var(--font-ui);
  font-size: 1rem;
  color: var(--text);
  outline: none;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--t), box-shadow var(--t);
}
.hero-search-input::placeholder { color: var(--text3); }
.hero-search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-bg);
}
.hero-search-submit {
  position: absolute;
  top: 50%;
  right: 6px;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(120deg, var(--accent), var(--accent2));
  color: #fff;
  border: none;
  font-family: inherit;
  font-size: 0.86rem;
  font-weight: 700;
  padding: 9px 18px;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform var(--t), box-shadow var(--t);
}
.hero-search-submit:hover { transform: translateY(calc(-50% - 1px)); box-shadow: var(--shadow); }
.hero-search-submit svg { width: 14px; height: 14px; }

.hero-suggestions {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  z-index: 50;
  display: none;
  text-align: left;
  max-height: 360px;
  overflow-y: auto;
}
.hero-suggestions.open { display: block; }

.suggestion-item {
  padding: 10px 18px;
  font-size: 0.92rem;
  color: var(--text2);
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
  transition: background var(--t);
}
.suggestion-item:last-child { border-bottom: none; }
.suggestion-item:hover { background: var(--accent-bg); color: var(--text); }
.suggestion-icon { color: var(--accent); flex-shrink: 0; display: inline-flex; }
.suggestion-icon svg { width: 14px; height: 14px; }

.hero-actions {
  margin-top: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--surface);
  color: var(--text2);
  border: 1px solid var(--border);
  padding: 8px 14px;
  border-radius: 999px;
  font-family: inherit;
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--t);
}
.btn-ghost:hover { background: var(--surface2); color: var(--text); border-color: var(--border2); }
.btn-ghost svg { width: 14px; height: 14px; color: var(--accent); }

/* ─────────────── MAIN CONTAINER ─────────────── */
main { flex: 1; min-width: 0; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2.5rem 1.35rem 3rem;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 1.1rem;
  gap: 1rem;
  flex-wrap: wrap;
}
.section-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.45rem;
  color: var(--text);
  letter-spacing: -0.015em;
}
.section-title em {
  font-style: italic;
  color: var(--accent);
}
.section-action {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  transition: opacity var(--t);
}
.section-action:hover { opacity: 0.75; }
.section-action svg { width: 14px; height: 14px; }

/* ─────────────── HOME LAYOUT ─────────────── */
.home-section + .home-section { margin-top: 3rem; }

/* featured grid */
.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

/* stone card (with image) */
.stone-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: transform var(--t), box-shadow var(--t), border-color var(--t);
  display: flex;
  flex-direction: column;
  cursor: pointer;
}
.stone-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: var(--border2);
}
.stone-card-img-wrap {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 30% 30%, var(--accent-bg), var(--surface2));
}
.stone-card-img-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(0,0,0,0.06));
}
.stone-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 400ms ease;
}
.stone-card:hover .stone-card-img { transform: scale(1.04); }
.stone-card-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  opacity: 0.55;
}
.stone-card-placeholder svg { width: 48px; height: 48px; }

.stone-card-body {
  padding: 0.95rem 1.1rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  flex: 1;
}
.stone-card-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.12rem;
  color: var(--text);
  letter-spacing: -0.01em;
  line-height: 1.2;
}
.stone-card-excerpt {
  font-size: 0.86rem;
  color: var(--text3);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.stone-card-meta {
  margin-top: 0.45rem;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.74rem;
  color: var(--accent2);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.stone-card-meta svg { width: 11px; height: 11px; }

/* compact card (no image) */
.stone-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.55rem;
}
.stone-list-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  font-size: 0.92rem;
  color: var(--text);
  transition: all var(--t);
}
.stone-list-item:hover {
  border-color: var(--accent);
  color: var(--accent2);
  transform: translateX(2px);
}
.stone-list-item-mark {
  width: 8px;
  height: 8px;
  flex-shrink: 0;
  border-radius: 2px;
  background: linear-gradient(135deg, var(--accent3), var(--accent));
  transform: rotate(45deg);
}

/* letters grid */
.letters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(72px, 1fr));
  gap: 8px;
}
.letter-tile {
  aspect-ratio: 1 / 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--text);
  text-transform: uppercase;
  cursor: pointer;
  transition: all var(--t);
}
.letter-tile:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.letter-tile.is-active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.letter-tile.is-empty {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
}

/* breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text3);
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--text3); transition: color var(--t); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb-sep {
  color: var(--text4);
  display: inline-flex;
}
.breadcrumb-sep svg { width: 10px; height: 10px; }
.breadcrumb-current { color: var(--text); font-weight: 600; }

/* page header (browse / stone) */
.page-header {
  margin-bottom: 1.75rem;
}
.page-header h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.8rem, 3.2vw, 2.4rem);
  color: var(--text);
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 0.4rem;
}
.page-header h1 em {
  font-style: italic;
  color: var(--accent);
}
.page-header p {
  color: var(--text2);
  font-size: 1rem;
  max-width: 640px;
}

/* ─────────────── BROWSE PAGE ─────────────── */
.browse-letters-bar {
  display: grid;
  grid-template-columns: repeat(13, 1fr);
  gap: 6px;
  padding: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  margin-bottom: 1.5rem;
  position: sticky;
  top: 62px;
  z-index: 10;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.browse-letters-bar .letter-tile {
  aspect-ratio: 1;
  width: auto;
  height: auto;
  font-size: 0.95rem;
  border-radius: 8px;
}

/* ─────────────── STONE PAGE ─────────────── */
.stone-page {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: 2.5rem;
  align-items: start;
}
@media (max-width: 860px) {
  .stone-page { grid-template-columns: 1fr; gap: 1.75rem; }
}

.stone-image-block {
  position: relative;
}
.stone-image-frame {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background:
    radial-gradient(ellipse at 30% 30%, var(--accent-bg), var(--surface2));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.stone-image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.stone-image-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  opacity: 0.5;
}
.stone-image-placeholder svg { width: 96px; height: 96px; }
.stone-image-credit {
  display: block;
  font-size: 0.74rem;
  color: var(--text4);
  margin-top: 8px;
  text-align: right;
}
.stone-image-credit a { color: var(--text3); text-decoration: underline; text-underline-offset: 2px; }
.stone-image-credit a:hover { color: var(--accent); }

.stone-content h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 4vw, 2.8rem);
  letter-spacing: -0.025em;
  color: var(--text);
  line-height: 1.05;
  margin-bottom: 0.5rem;
}
.stone-excerpt {
  font-size: 1.08rem;
  color: var(--text2);
  line-height: 1.55;
  margin-bottom: 1.5rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-style: italic;
}
.stone-props {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.stone-prop {
  display: grid;
  grid-template-columns: 200px 1fr;
  background: var(--surface);
  padding: 0.85rem 1.1rem;
  gap: 1rem;
  align-items: start;
}
.stone-prop-label {
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent2);
  padding-top: 2px;
}
.stone-prop-value {
  font-size: 0.95rem;
  color: var(--text);
  line-height: 1.5;
  word-break: break-word;
}
@media (max-width: 540px) {
  .stone-prop { grid-template-columns: 1fr; gap: 4px; }
}

.stone-actions {
  display: flex;
  gap: 8px;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.btn-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--accent-bg);
  color: var(--accent2);
  font-size: 0.84rem;
  font-weight: 700;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
  transition: all var(--t);
  text-decoration: none;
}
.btn-pill:hover {
  background: var(--accent);
  color: #fff;
}
.btn-pill svg { width: 13px; height: 13px; }

/* ─────────────── STATES ─────────────── */
.loading-state, .empty-state, .error-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 3rem 1rem;
  color: var(--text3);
  text-align: center;
}
.spinner {
  width: 28px;
  height: 28px;
  border: 2.5px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 800ms linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.error-state {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 2.5rem 1.5rem;
}
.error-state-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.2rem;
  color: var(--text);
}
.empty-state svg { width: 40px; height: 40px; color: var(--text4); margin-bottom: 4px; }

/* skeleton */
.skel {
  background: linear-gradient(90deg,
    var(--surface2) 0%,
    color-mix(in srgb, var(--surface2) 50%, var(--surface)) 50%,
    var(--surface2) 100%);
  background-size: 200% 100%;
  border-radius: var(--r);
  animation: skel 1.4s ease-in-out infinite;
}
@keyframes skel {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
.skel-card {
  height: 240px;
  border-radius: var(--r-lg);
}
.skel-line { height: 14px; margin: 6px 0; }
.skel-line.short { width: 60%; }

/* ─────────────── TOAST ─────────────── */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--text);
  color: var(--bg);
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 0.86rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--t), opacity var(--t);
  z-index: 4000;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ─────────────── RESPONSIVE ─────────────── */
@media (max-width: 640px) {
  .site-header { padding: 10px 1rem; }
  .header-vsep { display: none; }
  .header-nav a { padding: 6px 9px; font-size: 0.8rem; }
  .header-actions { margin-left: 0; }
  .container { padding: 1.75rem 1rem 2.5rem; }
  .hero { padding: 2.75rem 1rem 2.5rem; }
  .hero-search-input { padding: 12px 110px 12px 18px; font-size: 0.94rem; }
  .hero-search-submit { padding: 7px 14px; font-size: 0.8rem; }
  .stone-prop { grid-template-columns: 1fr; gap: 4px; padding: 0.75rem 0.9rem; }
  .browse-letters-bar { top: 54px; padding: 8px; gap: 3px; grid-template-columns: repeat(13, 1fr); }
  .browse-letters-bar .letter-tile { font-size: 0.75rem; }
  .letters-grid { grid-template-columns: repeat(7, 1fr); gap: 6px; }
  .letter-tile { font-size: 1.1rem; }
  .section-title { font-size: 1.25rem; }
}

/* ─────────────── DARK THEME TWEAKS ─────────────── */
[data-theme="dark"] .hero {
  background: transparent;
}
[data-theme="dark"] .hero-search-submit { color: #06251f; }
[data-theme="dark"] .lang-btn.active { color: #06251f; }
[data-theme="dark"] .letter-tile:hover, [data-theme="dark"] .letter-tile.is-active { color: #06251f; }
[data-theme="dark"] .btn-pill:hover { color: #06251f; }
[data-theme="dark"] .stone-card-img-wrap,
[data-theme="dark"] .stone-image-frame {
  background: radial-gradient(ellipse at 30% 30%, rgba(52,211,153,0.12), var(--surface2));
}
[data-theme="dark"] .skel {
  background: linear-gradient(90deg,
    var(--surface2) 0%,
    color-mix(in srgb, var(--surface2) 70%, var(--surface)) 50%,
    var(--surface2) 100%);
  background-size: 200% 100%;
}
[data-theme="dark"] .toast { background: var(--accent); color: #06251f; }

/* ─────────────── SVG BACKGROUND ─────────────── */
.bg-gems-pattern {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 1;
}
[data-theme="dark"] .bg-gems-pattern {
  opacity: 0.7;
}

/* ─────────────── 3-COLUMN LAYOUT ─────────────── */
.site-layout {
  display: grid;
  grid-template-columns: 220px 1fr 220px;
  min-height: 0;
  flex: 1;
  position: relative;
  z-index: 1;
}

.side-panel {
  position: sticky;
  top: 62px;
  height: calc(100vh - 62px);
  overflow-y: auto;
  padding: 1.25rem 0;
  border-color: var(--border);
}
.side-panel--left {
  border-right: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
}
.side-panel--right {
  border-left: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
}

/* scrollbar for panels */
.side-panel::-webkit-scrollbar { width: 4px; }
.side-panel::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.panel-section {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
}
.panel-section:last-child { border-bottom: none; }

.panel-heading {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-ui);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text3);
  margin-bottom: 0.6rem;
}
.panel-heading svg { width: 13px; height: 13px; color: var(--accent); flex-shrink: 0; }

.panel-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.panel-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: var(--r);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text2);
  transition: all var(--t);
  text-decoration: none;
}
.panel-link:hover {
  background: var(--accent-bg);
  color: var(--accent);
}
.panel-link.active {
  background: var(--accent-bg);
  color: var(--accent);
  font-weight: 600;
}
.panel-link svg { width: 14px; height: 14px; flex-shrink: 0; }

.panel-link-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  width: 100%;
  text-align: left;
}

.panel-gem-dot {
  width: 8px;
  height: 8px;
  border-radius: 2px;
  transform: rotate(45deg);
  flex-shrink: 0;
}

.panel-link--scale {
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
  font-size: 0.76rem;
}
.panel-scale-bar {
  display: block;
  height: 4px;
  border-radius: 2px;
  opacity: 0.55;
  transition: opacity var(--t);
}
.panel-link--scale:hover .panel-scale-bar { opacity: 1; }

.panel-letters {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 3px;
}
.panel-letter-tile {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 5px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.78rem;
  color: var(--text2);
  text-transform: uppercase;
  transition: all var(--t);
}
.panel-letter-tile:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  transform: scale(1.1);
}

/* Dark-theme panel adjustments */
[data-theme="dark"] .panel-letter-tile:hover { color: #06251f; }

/* ─────────────── RESPONSIVE: hide panels below 1100px ─────────────── */
@media (max-width: 1100px) {
  .site-layout {
    grid-template-columns: 1fr;
  }
  .side-panel {
    display: none;
  }
}