:root {
  /* Dark élégance : noir profond, or champagne, touche d'émeraude */
  --basalte: #0b0a09;
  --basalte-2: #060606;
  --pierre: #141210;
  --pierre-clair: #1e1b17;
  --liseret: #2e2921;
  --quartz: #efe9dc;
  --quartz-mat: #a2937b;
  --malachite: #2e6b57;
  --malachite-clair: #5da88c;
  --citrine: #d6b26b;
  --citrine-clair: #e9cd90;
  --grenat: #b35a45;
  --font-display: "Petrona", Georgia, serif;
  --font-body: "Work Sans", -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--basalte);
  color: var(--quartz);
  font-family: var(--font-body);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  position: relative;
}

/* subtle grain texture over the whole page, evokes raw stone */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

a { color: inherit; }

::selection { background: var(--citrine); color: var(--basalte-2); }

:focus-visible {
  outline: 2px solid var(--citrine);
  outline-offset: 3px;
}

/* ---------- Header ---------- */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.6rem 1.8rem 1rem;
  max-width: 920px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--citrine);
}

.header-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--quartz-mat);
}

.main-nav {
  display: flex;
  gap: 0.4rem;
}

.nav-tab {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.5rem 0.9rem;
  background: transparent;
  color: var(--quartz-mat);
  border: 1px solid transparent;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.nav-tab:hover { color: var(--quartz); }

.nav-tab.nav-active {
  color: var(--citrine);
  border-color: var(--liseret);
  border-bottom-color: var(--citrine);
}

/* Menu adapté au mobile : logo au-dessus, onglets centrés qui passent à la ligne */
@media (max-width: 640px) {
  .site-header {
    flex-direction: column;
    align-items: center;
    gap: 0.85rem;
    padding: 1.2rem 0.8rem 0.6rem;
  }

  .main-nav {
    width: 100%;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.3rem;
  }

  .nav-tab {
    font-size: 0.68rem;
    padding: 0.45rem 0.65rem;
    letter-spacing: 0.03em;
  }
}

/* ---------- Hero ---------- */
.hero {
  max-width: 720px;
  margin: 0 auto;
  padding: 3.2rem 1.8rem 2.4rem;
  text-align: center;
  position: relative;
  z-index: 2;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--malachite-clair);
  margin: 0 0 1.1rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.12;
  margin: 0 0 1.1rem;
  color: var(--quartz);
}

.hero h1 em {
  font-style: italic;
  color: var(--citrine);
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--quartz-mat);
  max-width: 480px;
  margin: 0 auto;
}

/* ---------- Specimen frame (signature element) ---------- */
.specimen-frame {
  position: relative;
  background: var(--pierre);
  border: 1px solid var(--liseret);
  padding: 2px;
}

.facet {
  position: absolute;
  width: 22px;
  height: 22px;
  pointer-events: none;
  z-index: 3;
}
.facet::before {
  content: "";
  position: absolute;
  inset: 0;
  border: 1.5px solid var(--citrine);
  opacity: 0.85;
}
.facet-tl { top: -1px; left: -1px; border-top: none; border-left: none; clip-path: polygon(0 0, 100% 0, 0 100%); }
.facet-tl::before { border-right: none; border-bottom: none; clip-path: polygon(0 0, 100% 0, 0 100%); }
.facet-tr { top: -1px; right: -1px; clip-path: polygon(0 0, 100% 0, 100% 100%); }
.facet-tr::before { border-left: none; border-bottom: none; clip-path: polygon(0 0, 100% 0, 100% 100%); }
.facet-bl { bottom: -1px; left: -1px; clip-path: polygon(0 0, 100% 100%, 0 100%); }
.facet-bl::before { border-right: none; border-top: none; clip-path: polygon(0 0, 100% 100%, 0 100%); }
.facet-br { bottom: -1px; right: -1px; clip-path: polygon(100% 0, 100% 100%, 0 100%); }
.facet-br::before { border-left: none; border-top: none; clip-path: polygon(100% 0, 100% 100%, 0 100%); }

/* ---------- Upload ---------- */
.upload-section {
  max-width: 560px;
  margin: 0 auto;
  padding: 0 1.8rem 1rem;
  position: relative;
  z-index: 2;
}

.drop-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 3.4rem 1.5rem;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
  text-align: center;
}

.drop-zone:hover { background: var(--pierre-clair); }
.drop-zone.drag-over { background: var(--pierre-clair); }

.drop-icon { color: var(--citrine); opacity: 0.85; }

.drop-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin: 0.3rem 0 0;
}

.drop-sub {
  font-size: 0.85rem;
  color: var(--quartz-mat);
  margin: 0;
}

.preview-wrap {
  padding: 1rem;
}
.preview-wrap img {
  display: block;
  width: 100%;
  max-height: 380px;
  object-fit: contain;
  margin: 0 auto;
}

.upload-actions {
  display: flex;
  justify-content: center;
  gap: 0.8rem;
  margin-top: 1.4rem;
}

.btn {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.75rem 1.6rem;
  border-radius: 2px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.2s ease;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--citrine);
  color: var(--basalte-2);
}
.btn-primary:hover { background: var(--citrine-clair); }

.btn-ghost {
  background: transparent;
  color: var(--quartz-mat);
  border-color: var(--liseret);
}
.btn-ghost:hover { color: var(--quartz); border-color: var(--quartz-mat); }

/* ---------- Loading ---------- */
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  margin-top: 1.6rem;
  text-align: center;
}

.loading-facet {
  width: 28px;
  height: 28px;
  border: 2px solid var(--citrine);
  clip-path: polygon(50% 0, 100% 35%, 80% 100%, 20% 100%, 0 35%);
  animation: spin 1.4s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading p {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--quartz-mat);
}

.error-msg {
  margin-top: 1.2rem;
  padding: 0.9rem 1.1rem;
  background: rgba(193, 96, 74, 0.12);
  border: 1px solid var(--grenat);
  color: #e8a392;
  font-size: 0.88rem;
  text-align: center;
}

/* ---------- Result ---------- */
.result {
  max-width: 720px;
  margin: 0 auto;
  padding: 2.4rem 1.8rem 1rem;
  position: relative;
  z-index: 2;
}

.result-inner { padding: 2.2rem 2rem; }

.result-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
}

.result-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--malachite-clair);
  margin: 0 0 0.4rem;
}

.result-head h2 {
  font-family: var(--font-display);
  font-size: 1.9rem;
  margin: 0;
  color: var(--quartz);
}

.result-scientific {
  font-family: var(--font-mono);
  font-style: italic;
  color: var(--quartz-mat);
  font-size: 0.85rem;
  margin: 0.3rem 0 0;
}

.confidence-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.35rem 0.7rem;
  border: 1px solid currentColor;
  white-space: nowrap;
}
.confidence-faible { color: var(--grenat); }
.confidence-moyen { color: var(--citrine); }
.confidence-élevé { color: var(--malachite-clair); }

.result-type {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--quartz-mat);
  margin: 1.1rem 0 0;
}

.result-description {
  margin: 0.6rem 0 0;
  color: var(--quartz);
  line-height: 1.65;
}

.result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.6rem;
  margin-top: 1.8rem;
}

@media (max-width: 600px) {
  .result-grid { grid-template-columns: 1fr; }
}

.result-block h3 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--quartz-mat);
  margin: 0 0 0.7rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--liseret);
}

.result-block ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.result-block li {
  font-size: 0.9rem;
  padding-left: 1rem;
  position: relative;
}
.result-block li::before {
  content: "◆";
  position: absolute;
  left: 0;
  top: 0.05em;
  font-size: 0.55rem;
  color: var(--malachite-clair);
}

.alternatives-block { margin-top: 1.8rem; }

.alt-item {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--liseret);
  font-size: 0.88rem;
}
.alt-item:last-child { border-bottom: none; }
.alt-item strong { color: var(--quartz); white-space: nowrap; }
.alt-item span { color: var(--quartz-mat); text-align: right; }

.result-warning {
  margin-top: 1.8rem;
  padding-top: 1.2rem;
  border-top: 1px dashed var(--liseret);
  font-size: 0.8rem;
  color: var(--quartz-mat);
  font-style: italic;
}

/* ---------- Expert chat ---------- */
.expert-chat {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.6rem 1.8rem 1rem;
  position: relative;
  z-index: 2;
}

.chat-header {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 1rem 1.2rem;
  background: var(--pierre);
  border: 1px solid var(--liseret);
  border-bottom: none;
}

.expert-avatar {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--basalte-2);
  border: 1px solid var(--citrine);
  color: var(--citrine);
  flex-shrink: 0;
}

.chat-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  margin: 0;
  color: var(--quartz);
}

.chat-subtitle {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--quartz-mat);
  margin: 0.15rem 0 0;
}

.chat-messages {
  background: var(--basalte-2);
  border: 1px solid var(--liseret);
  border-bottom: none;
  padding: 1.2rem;
  min-height: 120px;
  max-height: 420px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.chat-msg {
  max-width: 85%;
  padding: 0.7rem 1rem;
  font-size: 0.92rem;
  line-height: 1.55;
  white-space: pre-wrap;
}

.chat-msg.from-user {
  align-self: flex-end;
  background: var(--citrine);
  color: var(--basalte-2);
  border-radius: 8px 8px 2px 8px;
}

.chat-msg.from-expert {
  align-self: flex-start;
  background: var(--pierre);
  color: var(--quartz);
  border: 1px solid var(--liseret);
  border-radius: 8px 8px 8px 2px;
}

.chat-msg.msg-error {
  align-self: center;
  background: rgba(193, 96, 74, 0.12);
  border: 1px solid var(--grenat);
  color: #e8a392;
  font-size: 0.82rem;
}

.chat-typing {
  display: flex;
  gap: 5px;
  padding: 0.8rem 1.2rem;
  background: var(--basalte-2);
  border-left: 1px solid var(--liseret);
  border-right: 1px solid var(--liseret);
}

.chat-typing span {
  width: 7px;
  height: 7px;
  background: var(--quartz-mat);
  clip-path: polygon(50% 0, 100% 35%, 80% 100%, 20% 100%, 0 35%);
  animation: typing-pulse 1.2s ease-in-out infinite;
}
.chat-typing span:nth-child(2) { animation-delay: 0.18s; }
.chat-typing span:nth-child(3) { animation-delay: 0.36s; }

@keyframes typing-pulse {
  0%, 100% { opacity: 0.25; transform: translateY(0); }
  50% { opacity: 1; transform: translateY(-3px); }
}

.chat-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.8rem 1.2rem;
  background: var(--basalte-2);
  border-left: 1px solid var(--liseret);
  border-right: 1px solid var(--liseret);
}

.suggestion-chip {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.4rem 0.8rem;
  background: transparent;
  color: var(--citrine);
  border: 1px solid var(--citrine);
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.suggestion-chip:hover {
  background: var(--citrine);
  color: var(--basalte-2);
}

.chat-input-row {
  display: flex;
  gap: 0;
  border: 1px solid var(--liseret);
}

#chat-input {
  flex: 1;
  background: var(--pierre);
  border: none;
  padding: 0.9rem 1.1rem;
  color: var(--quartz);
  font-family: var(--font-body);
  font-size: 0.95rem;
}

#chat-input::placeholder { color: var(--quartz-mat); opacity: 0.7; }
#chat-input:focus { outline: none; background: var(--pierre-clair); }

.chat-send {
  border-radius: 0;
  flex-shrink: 0;
}

@media (prefers-reduced-motion: reduce) {
  .chat-typing span { animation: none; opacity: 0.6; }
}

/* ---------- Les outils du lapidaire ---------- */
.tools-section {
  max-width: 920px;
  margin: 0 auto;
  padding: 4rem 1.8rem 1rem;
  position: relative;
  z-index: 2;
  text-align: center;
}

.tool-card {
  background: linear-gradient(170deg, var(--pierre) 0%, var(--basalte-2) 100%);
  border: 1px solid var(--liseret);
  border-top: 2px solid var(--citrine);
  padding: 1.8rem 1.6rem;
  text-align: left;
  margin-top: 1.4rem;
}

.tool-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--quartz);
  margin: 0 0 0.4rem;
}

.tool-desc {
  font-size: 0.86rem;
  color: var(--quartz-mat);
  line-height: 1.55;
  margin: 0 0 1.4rem;
}

/* --- Échelle de Mohs --- */
.mohs-scale {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 4px;
}

@media (max-width: 560px) {
  .mohs-scale { grid-template-columns: repeat(5, 1fr); }
}

.mohs-seg {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 0.8rem 0;
  background: var(--basalte-2);
  color: var(--quartz-mat);
  border: 1px solid var(--liseret);
  cursor: pointer;
  text-align: center;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

.mohs-seg:hover {
  border-color: var(--citrine);
  color: var(--citrine);
  transform: translateY(-2px);
}

.mohs-seg.mohs-active {
  background: var(--citrine);
  color: var(--basalte-2);
  border-color: var(--citrine);
  font-weight: 500;
}

.mohs-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.3rem;
  margin-top: 0.8rem;
}

.mohs-legend span {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--quartz-mat);
}

.mohs-legend em {
  font-style: normal;
  color: var(--citrine);
}

.mohs-info {
  margin-top: 1.2rem;
  padding: 1.1rem 1.2rem;
  background: var(--basalte-2);
  border: 1px solid var(--liseret);
  border-left: 3px solid var(--citrine);
  min-height: 60px;
}

.mohs-info-placeholder {
  color: var(--quartz-mat);
  font-size: 0.85rem;
  font-style: italic;
  margin: 0;
}

.mohs-info h4 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--citrine);
  margin: 0 0 0.35rem;
}

.mohs-info p {
  font-size: 0.87rem;
  color: var(--quartz);
  line-height: 1.6;
  margin: 0 0 0.4rem;
}

.mohs-info .mohs-examples {
  font-size: 0.8rem;
  color: var(--quartz-mat);
  margin: 0;
}

/* --- Calculateur & convertisseur --- */
.tools-row {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 1.4rem;
  align-items: start;
}

@media (max-width: 720px) {
  .tools-row { grid-template-columns: 1fr; }
}

.tool-form {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.tool-form label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--quartz-mat);
  margin-top: 0.5rem;
}

.tool-form label:first-child { margin-top: 0; }

.tool-form select,
.tool-form input {
  background: var(--basalte-2);
  border: 1px solid var(--liseret);
  padding: 0.75rem 0.9rem;
  color: var(--quartz);
  font-family: var(--font-body);
  font-size: 0.93rem;
  width: 100%;
}

.tool-form select:focus,
.tool-form input:focus {
  outline: none;
  border-color: var(--citrine);
}

.calc-grams {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--citrine);
  margin: 0.1rem 0 0;
  min-height: 1em;
}

.tool-btn {
  margin-top: 1rem;
  align-self: flex-start;
}

.calc-result {
  margin-top: 1.3rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--liseret);
}

.calc-range {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--citrine);
  margin: 0 0 0.6rem;
}

.calc-note {
  font-size: 0.78rem;
  color: var(--quartz-mat);
  font-style: italic;
  line-height: 1.55;
  margin: 0 0 1rem;
}

.conv-form { position: relative; }

.conv-symbol {
  font-size: 1.1rem;
  color: var(--citrine);
  text-align: center;
  margin: 0.3rem 0;
}

.conv-hint {
  margin: 1.2rem 0 0;
  font-size: 0.78rem;
  color: var(--quartz-mat);
  font-style: italic;
  line-height: 1.55;
}

/* --- Simulateur UV --- */
.tool-head-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.2rem;
  flex-wrap: wrap;
}

.uv-toggle { flex-shrink: 0; }

.uv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.8rem;
  margin-top: 0.4rem;
  padding: 1rem;
  border: 1px solid var(--liseret);
  background: var(--pierre);
  transition: background 0.5s ease;
}

.uv-grid.uv-on {
  background: #050508;
}

.uv-stone {
  padding: 0.85rem 0.95rem;
  background: var(--basalte-2);
  border: 1px solid var(--liseret);
  transition: border-color 0.5s ease;
}

.uv-grid.uv-on .uv-stone {
  background: #030306;
}

.uv-dot {
  display: block;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  margin-bottom: 0.6rem;
  transition: background 0.5s ease, box-shadow 0.5s ease;
}

.uv-name {
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--quartz);
  margin: 0 0 0.25rem;
}

.uv-reaction {
  font-size: 0.76rem;
  color: var(--quartz-mat);
  line-height: 1.45;
  margin: 0;
}

/* --- Compatibilité à l'eau --- */
.water-result {
  margin-top: 1.2rem;
  padding: 1rem 1.1rem;
  background: var(--basalte-2);
  border: 1px solid var(--liseret);
}

.water-verdict {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  margin: 0 0 0.5rem;
}

.water-verdict.water-ok { color: var(--malachite-clair); }
.water-verdict.water-brief { color: var(--citrine); }
.water-verdict.water-never { color: #e07a63; }

.water-reason {
  font-size: 0.85rem;
  color: var(--quartz-mat);
  line-height: 1.6;
  margin: 0;
}

/* --- Pierre de naissance --- */
.birth-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.45rem;
}

.birth-btn {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.55rem 0.2rem;
  background: var(--basalte-2);
  color: var(--quartz-mat);
  border: 1px solid var(--liseret);
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.birth-btn:hover {
  color: var(--citrine);
  border-color: var(--citrine);
}

.birth-btn.birth-active {
  background: var(--citrine);
  color: var(--basalte-2);
  border-color: var(--citrine);
}

.birth-result {
  margin-top: 1.2rem;
  padding: 1rem 1.1rem;
  background: var(--basalte-2);
  border: 1px solid var(--liseret);
  border-left: 3px solid var(--citrine);
}

.birth-result h4 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--citrine);
  margin: 0 0 0.4rem;
}

.birth-result p {
  font-size: 0.85rem;
  color: var(--quartz);
  line-height: 1.6;
  margin: 0;
}

/* --- Guide des tailles de gemmes --- */
.cuts-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.1rem;
}

@media (max-width: 820px) {
  .cuts-grid { grid-template-columns: repeat(2, 1fr); }
}

.cut-item {
  text-align: center;
  padding: 1.2rem 0.9rem 1.1rem;
  background: var(--basalte-2);
  border: 1px solid var(--liseret);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.cut-item:hover {
  border-color: var(--citrine);
  transform: translateY(-3px);
}

.cut-item svg {
  width: 62px;
  height: 62px;
  color: var(--citrine);
  filter: drop-shadow(0 3px 8px rgba(0, 0, 0, 0.5));
  margin-bottom: 0.7rem;
}

.cut-item h4 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 500;
  color: var(--quartz);
  margin: 0 0 0.35rem;
}

.cut-item p {
  font-size: 0.76rem;
  color: var(--quartz-mat);
  line-height: 1.5;
  margin: 0;
}

/* --- Carte mondiale des gisements --- */
.world-map-wrap {
  position: relative;
  border: 1px solid var(--liseret);
  background: var(--basalte-2);
  padding: 0.6rem;
}

.world-map svg {
  display: block;
  width: 100%;
  height: auto;
}

.wm-country {
  fill: var(--pierre-clair);
  stroke: var(--basalte);
  stroke-width: 0.5;
}

.wm-gem {
  fill: rgba(214, 178, 107, 0.38);
  stroke: var(--citrine);
  stroke-width: 0.6;
  cursor: pointer;
  transition: fill 0.15s ease;
}

.wm-gem:hover,
.wm-gem.wm-selected {
  fill: var(--citrine);
}

.wm-tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--basalte-2);
  border: 1px solid var(--citrine);
  color: var(--citrine);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  padding: 0.35rem 0.65rem;
  white-space: nowrap;
  z-index: 5;
}

.wm-info {
  margin-top: 1rem;
  padding: 1rem 1.1rem;
  background: var(--basalte-2);
  border: 1px solid var(--liseret);
  border-left: 3px solid var(--citrine);
  min-height: 58px;
}

.wm-info-placeholder {
  color: var(--quartz-mat);
  font-size: 0.85rem;
  font-style: italic;
  margin: 0;
}

.wm-info h4 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--citrine);
  margin: 0 0 0.35rem;
}

.wm-info p {
  font-size: 0.87rem;
  color: var(--quartz);
  line-height: 1.6;
  margin: 0;
}

.wm-error {
  color: var(--quartz-mat);
  font-style: italic;
  font-size: 0.85rem;
  padding: 2rem;
  text-align: center;
}

/* ---------- Glossaire ---------- */
.glossary-section {
  max-width: 720px;
  margin: 0 auto;
  padding: 2.5rem 1.8rem 1rem;
  position: relative;
  z-index: 2;
}

.glossary-search {
  display: block;
  width: 100%;
  background: var(--pierre);
  border: 1px solid var(--liseret);
  padding: 0.9rem 1.1rem;
  color: var(--quartz);
  font-family: var(--font-body);
  font-size: 0.95rem;
  margin-bottom: 1.8rem;
}

.glossary-search::placeholder { color: var(--quartz-mat); opacity: 0.6; }
.glossary-search:focus { outline: none; border-color: var(--citrine); }

.glossary-list {
  margin: 0;
}

.glossary-list dt {
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 500;
  color: var(--citrine);
  padding-top: 1.1rem;
  margin-top: 1.1rem;
  border-top: 1px solid var(--liseret);
}

.glossary-list dt:first-child {
  border-top: none;
  margin-top: 0;
  padding-top: 0;
}

.glossary-list dd {
  font-size: 0.9rem;
  color: var(--quartz-mat);
  line-height: 1.65;
  margin: 0.35rem 0 0;
}

.glossary-empty {
  text-align: center;
  color: var(--quartz-mat);
  font-style: italic;
  font-size: 0.9rem;
  padding: 2rem 0;
}

/* ---------- Les quatre précieuses ---------- */
.precious-section {
  max-width: 920px;
  margin: 0 auto;
  padding: 4rem 1.8rem 1.5rem;
  position: relative;
  z-index: 2;
  text-align: center;
}

.precious-eyebrow { margin-bottom: 0.8rem; }

.precious-title {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 500;
  margin: 0 0 0.7rem;
  color: var(--quartz);
}

.precious-intro {
  color: var(--quartz-mat);
  font-size: 0.92rem;
  max-width: 520px;
  margin: 0 auto 2.6rem;
  line-height: 1.6;
}

.gems-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.2rem;
  text-align: left;
}

@media (max-width: 900px) {
  .gems-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .gems-grid { grid-template-columns: 1fr; }
}

.gem-card {
  background: linear-gradient(170deg, var(--pierre) 0%, var(--basalte-2) 100%);
  border: 1px solid var(--liseret);
  border-top: 2px solid var(--citrine);
  padding: 1.6rem 1.3rem 1.5rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.gem-card:hover {
  transform: translateY(-4px);
  border-color: var(--citrine);
}

.gem-visual {
  display: flex;
  justify-content: center;
  margin-bottom: 1.1rem;
  filter: drop-shadow(0 6px 14px rgba(0, 0, 0, 0.5));
}

.gem-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 500;
  text-align: center;
  margin: 0 0 0.3rem;
  color: var(--quartz);
}

.gem-hardness {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  text-align: center;
  color: var(--citrine);
  margin: 0 0 0.9rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--liseret);
}

.gem-info {
  font-size: 0.83rem;
  line-height: 1.6;
  color: var(--quartz-mat);
  margin: 0;
}

/* ---------- About & keywords ---------- */
.about-section {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 1.8rem 1rem;
  position: relative;
  z-index: 2;
}

.about-inner h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 500;
  margin: 0 0 1.2rem;
  color: var(--quartz);
}

.about-inner p {
  color: var(--quartz-mat);
  font-size: 0.95rem;
  line-height: 1.7;
  margin: 0 0 1rem;
}

.keywords-block {
  margin-top: 2.2rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--liseret);
}

.keywords-block h3 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--quartz-mat);
  margin: 0 0 1rem;
}

.keywords-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.keywords-cloud span {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  padding: 0.32rem 0.7rem;
  color: var(--quartz-mat);
  border: 1px solid var(--liseret);
  border-radius: 999px;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.keywords-cloud span:hover {
  color: var(--malachite-clair);
  border-color: var(--malachite);
}

/* ---------- E-book ---------- */
.ebook-section {
  max-width: 820px;
  margin: 0 auto;
  padding: 3.4rem 1.8rem 2rem;
  position: relative;
  z-index: 2;
}

.ebook-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 2rem;
  align-items: center;
  padding: 2.4rem 2.2rem;
}

@media (max-width: 680px) {
  .ebook-inner { grid-template-columns: 1fr; }
  .ebook-visual { order: -1; }
}

.ebook-text h2 {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 500;
  margin: 0.3rem 0 0.9rem;
  color: var(--quartz);
}

.ebook-text > p {
  color: var(--quartz-mat);
  font-size: 0.93rem;
  line-height: 1.65;
  margin: 0 0 1.1rem;
}

.ebook-points {
  list-style: none;
  margin: 0 0 1.6rem;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.ebook-points li {
  font-size: 0.88rem;
  color: var(--quartz);
  padding-left: 1rem;
  position: relative;
}

.ebook-points li::before {
  content: "◆";
  position: absolute;
  left: 0;
  top: 0.1em;
  font-size: 0.55rem;
  color: var(--citrine);
}

.btn-gold {
  display: inline-block;
  background: var(--citrine);
  color: var(--basalte-2);
  text-decoration: none;
  font-weight: 600;
}

.btn-gold:hover { background: #e8b654; }

.ebook-visual {
  display: flex;
  justify-content: center;
}

.ebook-cover {
  width: 180px;
  aspect-ratio: 3 / 4.2;
  background: linear-gradient(155deg, var(--pierre-clair), var(--basalte-2));
  border: 1px solid var(--liseret);
  border-left: 3px solid var(--citrine);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 1.4rem 1rem;
  text-align: center;
  color: var(--citrine);
  box-shadow: 8px 10px 30px rgba(0, 0, 0, 0.45);
  transform: rotate(2.5deg);
  transition: transform 0.25s ease;
}

.ebook-cover:hover { transform: rotate(0deg) scale(1.02); }

.ebook-cover-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  line-height: 1.3;
  color: var(--quartz);
  margin: 0;
}

.ebook-cover-sub {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--quartz-mat);
  margin: 0;
}

/* ---------- Footer social ---------- */
.footer-social {
  display: flex;
  justify-content: center;
  gap: 1.1rem;
  margin-bottom: 1.4rem;
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  color: var(--quartz-mat);
  border: 1px solid var(--liseret);
  border-radius: 50%;
  transition: color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

.footer-social a:hover {
  color: var(--citrine);
  border-color: var(--citrine);
  transform: translateY(-2px);
}

/* ---------- Compteur ---------- */
.hero-counter {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--quartz-mat);
  margin: 1.4rem 0 0;
}

.hero-counter strong {
  color: var(--citrine);
  font-size: 1rem;
  font-weight: 500;
}

/* ---------- Badge compteur vitrine dans la nav ---------- */
.nav-count {
  display: inline-block;
  min-width: 1.3em;
  padding: 0.05em 0.35em;
  margin-left: 0.25em;
  background: var(--citrine);
  color: var(--basalte-2);
  border-radius: 999px;
  font-size: 0.85em;
  text-align: center;
}

/* ---------- Sélecteur de mode ---------- */
.mode-toggle {
  display: flex;
  justify-content: center;
  margin-bottom: 1.2rem;
  border: 1px solid var(--liseret);
  border-radius: 2px;
  overflow: hidden;
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
}

.mode-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.6rem 1.1rem;
  background: transparent;
  color: var(--quartz-mat);
  border: none;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.mode-btn:hover { color: var(--quartz); }

.mode-btn.mode-active {
  background: var(--citrine);
  color: var(--basalte-2);
}

/* ---------- Grille de photos ---------- */
.preview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.7rem;
  padding: 1rem;
}

.preview-cell {
  position: relative;
  aspect-ratio: 1;
  overflow: hidden;
  border: 1px solid var(--liseret);
}

.preview-cell img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.preview-remove {
  position: absolute;
  top: 5px;
  right: 5px;
  width: 26px;
  height: 26px;
  background: rgba(21, 19, 15, 0.85);
  color: var(--quartz);
  border: 1px solid var(--liseret);
  border-radius: 50%;
  font-size: 0.75rem;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.preview-remove:hover {
  background: var(--grenat);
  color: var(--quartz);
}

/* ---------- Champ authenticité ---------- */
.claimed-row {
  margin-top: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.claimed-row label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--quartz-mat);
}

.claimed-row input {
  background: var(--pierre);
  border: 1px solid var(--liseret);
  padding: 0.85rem 1rem;
  color: var(--quartz);
  font-family: var(--font-body);
  font-size: 0.95rem;
}

.claimed-row input::placeholder { color: var(--quartz-mat); opacity: 0.6; }
.claimed-row input:focus { outline: none; border-color: var(--citrine); background: var(--pierre-clair); }

/* ---------- Actions du résultat ---------- */
.result-actions {
  margin-top: 1.4rem;
  display: flex;
  justify-content: center;
}

.result-actions .btn:disabled {
  opacity: 0.75;
  cursor: default;
}

/* ---------- Ma vitrine ---------- */
.collection-section {
  max-width: 820px;
  margin: 0 auto;
  padding: 2.5rem 1.8rem 1rem;
  position: relative;
  z-index: 2;
}

.collection-title {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 500;
  text-align: center;
  margin: 0 0 0.4rem;
  color: var(--quartz);
}

.collection-sub {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-align: center;
  color: var(--quartz-mat);
  margin: 0 0 2rem;
}

.collection-empty {
  text-align: center;
  color: var(--quartz-mat);
  font-size: 0.92rem;
  padding: 2.5rem 1rem;
  border: 1px dashed var(--liseret);
}

.collection-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1.1rem;
}

.collection-card {
  background: var(--pierre);
  border: 1px solid var(--liseret);
  overflow: hidden;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.collection-card:hover {
  transform: translateY(-3px);
  border-color: var(--quartz-mat);
}

.collection-card img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  display: block;
}

.collection-card-body {
  padding: 0.75rem 0.85rem 0.9rem;
}

.collection-card-name {
  font-family: var(--font-display);
  font-size: 0.98rem;
  color: var(--quartz);
  margin: 0 0 0.25rem;
  line-height: 1.25;
}

.collection-card-meta {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--quartz-mat);
  margin: 0 0 0.6rem;
}

.collection-card-delete {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 0.3rem 0.65rem;
  background: transparent;
  color: var(--quartz-mat);
  border: 1px solid var(--liseret);
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.collection-card-delete:hover {
  color: #e8a392;
  border-color: var(--grenat);
}

/* ---------- How it works ---------- */
.how-it-works {
  max-width: 820px;
  margin: 0 auto;
  padding: 4.5rem 1.8rem 3rem;
  position: relative;
  z-index: 2;
}

.how-it-works h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  text-align: center;
  margin: 0 0 2.4rem;
  color: var(--quartz);
  font-weight: 500;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.3rem;
}

@media (max-width: 700px) {
  .steps { grid-template-columns: 1fr; gap: 1.2rem; }
}

.step {
  position: relative;
  background: linear-gradient(165deg, var(--pierre) 0%, var(--basalte-2) 100%);
  border: 1px solid var(--liseret);
  padding: 1.7rem 1.5rem 1.6rem;
  /* coin supérieur droit biseauté, en écho aux facettes */
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 0 100%);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.step::before {
  /* liseré doré du biseau */
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, transparent 48%, var(--citrine) 48%, var(--citrine) 55%, transparent 55%);
  pointer-events: none;
}

.step::after {
  /* fine ligne dorée en pied de carte */
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--citrine), transparent 65%);
  opacity: 0.55;
  transition: opacity 0.2s ease;
}

.step:hover {
  transform: translateY(-4px);
  border-color: var(--citrine);
}

.step:hover::after { opacity: 1; }

.step-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.1rem;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--citrine);
  display: block;
}

.step-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  color: var(--citrine);
  border: 1px solid var(--liseret);
  background: var(--basalte-2);
  /* pastille hexagonale */
  clip-path: polygon(50% 0, 93% 25%, 93% 75%, 50% 100%, 7% 75%, 7% 25%);
  transition: border-color 0.2s ease;
}

.step:hover .step-icon { border-color: var(--citrine); }

.step h3 {
  font-family: var(--font-display);
  font-size: 1.18rem;
  margin: 0 0 0.5rem;
  font-weight: 500;
  color: var(--quartz);
}

.step p {
  font-size: 0.87rem;
  color: var(--quartz-mat);
  margin: 0;
  line-height: 1.6;
}

/* ---------- Footer ---------- */
.site-footer {
  text-align: center;
  padding: 2.4rem 1.8rem 3rem;
  position: relative;
  z-index: 2;
}

.site-footer p {
  font-size: 0.78rem;
  color: var(--quartz-mat);
  opacity: 0.7;
}

@media (prefers-reduced-motion: reduce) {
  .loading-facet { animation: none; }
  html { scroll-behavior: auto; }
}