/* ==========================================================================
   Lumis Diamonds — Champagne Ivory design system
   Palette grounded in observed boutique lab-grown convention:
   warm ivory base + espresso ink + one champagne accent.
   ========================================================================== */

:root {
  --ivory: #f7f5f0;
  --ivory-deep: #efece4;
  --paper: #fffefb;
  --sand: #ccc4a7;
  --champagne: #c69f70;
  --champagne-deep: #ad8440;
  --ink: #17120d;
  --ink-soft: #5c554a;
  --line: rgba(23, 18, 13, 0.12);
  --line-soft: rgba(23, 18, 13, 0.07);
  --font-display: "Cormorant", Georgia, serif;
  --font-body: "Inter", -apple-system, "Helvetica Neue", sans-serif;
  --nav-h: 72px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--ivory);
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  clip-path: inset(50%);
  overflow: hidden;
  white-space: nowrap;
}

section { scroll-margin-top: var(--nav-h); }

.wrap {
  width: min(1160px, calc(100% - 48px));
  margin-inline: auto;
}

/* ---- Type ---------------------------------------------------------------- */

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.12;
  letter-spacing: 0.01em;
}

h1 { font-size: clamp(2.9rem, 6.5vw, 4.8rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: 1.45rem; }

.eyebrow {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--champagne-deep);
  display: block;
  margin-bottom: 1.1rem;
}

.lede {
  color: var(--ink-soft);
  font-size: 1.08rem;
  max-width: 34em;
}

.section-head { max-width: 620px; margin-bottom: 3.2rem; }
.section-head.centered { margin-inline: auto; text-align: center; }
.section-head .lede { margin-top: 1rem; }
.section-head.centered .lede { margin-inline: auto; }

/* ---- Buttons ------------------------------------------------------------- */

.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 1.05em 2.4em;
  border: 1px solid var(--ink);
  border-radius: 2px;
  cursor: pointer;
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
  background: transparent;
  color: var(--ink);
  text-align: center;
}

.btn-primary { background: var(--ink); color: var(--ivory); }
.btn-primary:hover { background: var(--champagne-deep); border-color: var(--champagne-deep); }
.btn-ghost:hover { background: var(--ink); color: var(--ivory); }
.btn[disabled] { opacity: 0.45; cursor: not-allowed; }

/* ---- Nav ----------------------------------------------------------------- */

.nav {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-h);
  z-index: 50;
  background: rgba(247, 245, 240, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line-soft);
}

.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.wordmark { display: flex; flex-direction: column; line-height: 1; }
.wordmark .lumis {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 600;
  letter-spacing: 0.34em;
}
.wordmark .diamonds {
  font-size: 0.52rem;
  font-weight: 600;
  letter-spacing: 0.52em;
  text-transform: uppercase;
  color: var(--champagne-deep);
  margin-top: 4px;
}

.nav-links { display: flex; align-items: center; gap: 2.2rem; list-style: none; }
.nav-links a {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  transition: color 0.2s ease;
}
.nav-links a:hover { color: var(--ink); }

.nav-actions { display: flex; align-items: center; gap: 1rem; }

.cart-btn {
  position: relative;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--ink);
}
.cart-count {
  position: absolute;
  top: -2px;
  right: -4px;
  min-width: 17px;
  height: 17px;
  border-radius: 50%;
  background: var(--champagne-deep);
  color: var(--paper);
  font-size: 0.62rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 3px;
}
.cart-count[hidden] { display: none; }

.menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--ink);
}

/* ---- Hero ---------------------------------------------------------------- */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: var(--nav-h);
  background:
    radial-gradient(ellipse 90% 70% at 78% 18%, rgba(198, 159, 112, 0.16), transparent 60%),
    radial-gradient(ellipse 70% 60% at 12% 88%, rgba(204, 196, 167, 0.28), transparent 65%),
    linear-gradient(175deg, var(--paper) 0%, var(--ivory) 55%, var(--ivory-deep) 100%);
}

.hero-art {
  position: absolute;
  right: max(-4vw, -60px);
  top: 50%;
  transform: translateY(-48%);
  width: clamp(340px, 46vw, 680px);
  opacity: 0.9;
  pointer-events: none;
}

.hero-content { position: relative; max-width: 580px; padding-block: 4rem; }
.hero-content h1 { margin-bottom: 1.4rem; }
.hero-content .lede { font-size: 1.14rem; margin-bottom: 2.6rem; }

.hero-ctas { display: flex; flex-wrap: wrap; gap: 0.9rem; }

.hero-note {
  margin-top: 2.6rem;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  display: flex;
  align-items: center;
  gap: 0.55em;
}
.hero-note .spark { color: var(--champagne-deep); }

/* ---- Trust strip ---------------------------------------------------------- */

.trust { background: var(--paper); border-block: 1px solid var(--line-soft); }
.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  padding-block: 2.4rem;
}
.trust-item { display: flex; align-items: center; gap: 0.95rem; }
.trust-item svg { flex: none; color: var(--champagne-deep); }
.trust-item strong {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.trust-item span { font-size: 0.76rem; color: var(--ink-soft); }

/* ---- Collection ------------------------------------------------------------ */

.collection { padding-block: 7rem 6rem; }

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.2rem 1.8rem;
}

.group-label {
  grid-column: 1 / -1;
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--champagne-deep);
  border-bottom: 1px solid var(--line-soft);
  padding-bottom: 0.7rem;
  margin-top: 2.2rem;
}
.group-label:first-of-type { margin-top: 0; }

.product { display: flex; flex-direction: column; }

.product-media {
  position: relative;
  aspect-ratio: 4 / 5;
  border: 1px solid var(--line-soft);
  border-radius: 2px;
  background:
    radial-gradient(ellipse 75% 55% at 50% 38%, rgba(198, 159, 112, 0.14), transparent 70%),
    linear-gradient(180deg, var(--paper), var(--ivory-deep));
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}
.product:hover .product-media {
  transform: translateY(-4px);
  box-shadow: 0 18px 40px -22px rgba(23, 18, 13, 0.35);
}
.product-media svg { width: 58%; height: auto; }

.product-media.rose {
  background:
    radial-gradient(ellipse 75% 55% at 50% 38%, rgba(198, 143, 152, 0.18), transparent 70%),
    linear-gradient(180deg, var(--paper), #f0e6e4);
}

.placeholder-tag {
  position: absolute;
  bottom: 10px;
  right: 12px;
  font-size: 0.58rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sand);
}

.product-info { padding-top: 1.15rem; display: flex; flex-direction: column; gap: 0.3rem; flex: 1; }
.product-info h3 { font-size: 1.3rem; }
.product-spec { font-size: 0.76rem; color: var(--ink-soft); letter-spacing: 0.04em; }
.product-price {
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-top: 0.25rem;
}
.product-price em { font-style: normal; font-weight: 400; color: var(--ink-soft); font-size: 0.78rem; }

.metal-select {
  margin-top: 0.55rem;
  align-self: flex-start;
  font-family: var(--font-body);
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 0.5em 0.9em;
  cursor: pointer;
}
.metal-select:focus { outline: none; border-color: var(--champagne-deep); }

.add-btn {
  margin-top: 1rem;
  align-self: flex-start;
  padding: 0.85em 1.9em;
}

/* ---- Why lab-grown --------------------------------------------------------- */

.why { background: var(--paper); border-block: 1px solid var(--line-soft); padding-block: 7rem; }

.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem 2.6rem;
}
.why-card svg { color: var(--champagne-deep); margin-bottom: 1.4rem; }
.why-card h3 { margin-bottom: 0.8rem; }
.why-card p { font-size: 0.95rem; color: var(--ink-soft); }

.why-quote {
  margin-top: 4.5rem;
  padding-top: 3.5rem;
  border-top: 1px solid var(--line-soft);
  text-align: center;
}
.why-quote blockquote {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 500;
  font-style: italic;
  max-width: 21em;
  margin-inline: auto;
  line-height: 1.35;
}
.why-quote .spark { color: var(--champagne-deep); font-style: normal; }

/* ---- Compare ---------------------------------------------------------------- */

.compare { padding-block: 7rem; }

.compare-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 2px; background: var(--paper); }

.compare table { width: 100%; border-collapse: collapse; min-width: 620px; }
.compare th, .compare td {
  text-align: left;
  padding: 1.15rem 1.6rem;
  border-bottom: 1px solid var(--line-soft);
  font-size: 0.92rem;
  vertical-align: top;
}
.compare thead th {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line);
}
.compare thead th.lumis-col { color: var(--champagne-deep); }
.compare tbody th {
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.03em;
  white-space: nowrap;
  color: var(--ink);
}
.compare td { color: var(--ink-soft); }
.compare tbody tr:last-child th, .compare tbody tr:last-child td { border-bottom: none; }

.compare-footnote {
  margin-top: 1.1rem;
  font-size: 0.76rem;
  color: var(--ink-soft);
  max-width: 52em;
}

/* ---- Testimonials ------------------------------------------------------------ */

.reviews { background: var(--paper); border-block: 1px solid var(--line-soft); padding-block: 7rem; }

.review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.8rem; }

.review-card {
  border: 1px solid var(--line-soft);
  border-radius: 2px;
  background: var(--ivory);
  padding: 2rem 1.8rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.stars { color: var(--champagne-deep); letter-spacing: 0.2em; font-size: 0.85rem; }
.review-card p { font-size: 0.94rem; color: var(--ink-soft); flex: 1; }
.review-card footer { font-size: 0.8rem; font-weight: 600; letter-spacing: 0.05em; }
.review-card footer span { display: block; font-weight: 400; color: var(--ink-soft); font-size: 0.72rem; margin-top: 2px; }

/* ---- FAQ ---------------------------------------------------------------------- */

.faq { padding-block: 7rem; }
.faq-list { max-width: 760px; margin-inline: auto; }

.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  padding: 1.5rem 0.2rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 500;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-family: var(--font-body);
  font-size: 1.2rem;
  font-weight: 300;
  color: var(--champagne-deep);
  transition: transform 0.25s ease;
  flex: none;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item .faq-body { padding: 0 0.2rem 1.6rem; font-size: 0.95rem; color: var(--ink-soft); max-width: 60ch; }

/* ---- Enquiry -------------------------------------------------------------------- */

.enquiry { background: var(--ink); color: var(--ivory); padding-block: 7rem; }
.enquiry .eyebrow { color: var(--champagne); }
.enquiry .lede { color: rgba(247, 245, 240, 0.7); }

.enquiry-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 4rem;
  align-items: start;
}

.enquiry-aside p { font-size: 0.95rem; color: rgba(247, 245, 240, 0.7); margin-top: 1.2rem; max-width: 36ch; }
.enquiry-contact { margin-top: 2.2rem; font-size: 0.85rem; line-height: 2.1; color: rgba(247, 245, 240, 0.85); }
.enquiry-contact strong { color: var(--champagne); font-weight: 600; letter-spacing: 0.08em; font-size: 0.7rem; text-transform: uppercase; display: block; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.form-field { display: flex; flex-direction: column; gap: 0.45rem; }
.form-field.full { grid-column: 1 / -1; }

.form-field label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(247, 245, 240, 0.65);
}

.form-field input,
.form-field select,
.form-field textarea {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--ivory);
  background: rgba(247, 245, 240, 0.06);
  border: 1px solid rgba(247, 245, 240, 0.22);
  border-radius: 2px;
  padding: 0.85em 1em;
  transition: border-color 0.2s ease;
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--champagne);
}
.form-field select { appearance: none; }
.form-field select option { color: var(--ink); }
.form-field textarea { resize: vertical; min-height: 120px; }

.enquiry .btn-primary {
  background: var(--champagne);
  border-color: var(--champagne);
  color: var(--ink);
  margin-top: 1.4rem;
}
.enquiry .btn-primary:hover { background: var(--ivory); border-color: var(--ivory); }

.form-success {
  display: none;
  margin-top: 1.4rem;
  padding: 1rem 1.2rem;
  border: 1px solid var(--champagne);
  border-radius: 2px;
  font-size: 0.88rem;
  color: var(--champagne);
}
.form-success.visible { display: block; }

/* ---- Footer ----------------------------------------------------------------------- */

.footer { background: var(--ink); color: rgba(247, 245, 240, 0.6); border-top: 1px solid rgba(247, 245, 240, 0.1); }

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2.5rem;
  padding-block: 3.5rem 2.5rem;
}
.footer .wordmark .lumis { color: var(--ivory); }
.footer-tagline { font-size: 0.82rem; margin-top: 0.9rem; max-width: 30ch; }

.footer-links { display: flex; gap: 4rem; }
.footer-links ul { list-style: none; }
.footer-links strong {
  display: block;
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--champagne);
  margin-bottom: 0.9rem;
}
.footer-links li { margin-bottom: 0.5rem; }
.footer-links a { font-size: 0.84rem; transition: color 0.2s ease; }
.footer-links a:hover { color: var(--ivory); }

.footer-legal {
  border-top: 1px solid rgba(247, 245, 240, 0.1);
  padding-block: 1.6rem;
  font-size: 0.72rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 2rem;
  justify-content: space-between;
}

/* ---- Cart drawer --------------------------------------------------------------------- */

.cart-overlay {
  position: fixed;
  inset: 0;
  background: rgba(23, 18, 13, 0.4);
  z-index: 90;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.cart-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(420px, 92vw);
  background: var(--paper);
  z-index: 100;
  transform: translateX(100%);
  transition: transform 0.35s ease;
  display: flex;
  flex-direction: column;
  box-shadow: -20px 0 60px -30px rgba(23, 18, 13, 0.4);
}

body.cart-open .cart-overlay { opacity: 1; pointer-events: auto; }
body.cart-open .cart-drawer { transform: translateX(0); }
body.cart-open { overflow: hidden; }

.cart-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 1.8rem;
  border-bottom: 1px solid var(--line-soft);
}
.cart-head h3 { font-size: 1.4rem; }
.cart-close { background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--ink-soft); line-height: 1; padding: 4px; }

.cart-items { flex: 1; overflow-y: auto; padding: 1.2rem 1.8rem; }
.cart-empty { color: var(--ink-soft); font-size: 0.9rem; padding-block: 2rem; text-align: center; }

.cart-item {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  padding-block: 1rem;
  border-bottom: 1px solid var(--line-soft);
}
.cart-item-name { font-family: var(--font-display); font-size: 1.1rem; font-weight: 500; }
.cart-item-price { font-size: 0.8rem; color: var(--ink-soft); margin-top: 2px; }

.qty-controls { display: flex; align-items: center; gap: 0.6rem; margin-top: 0.5rem; }
.qty-controls button {
  width: 24px; height: 24px;
  border: 1px solid var(--line);
  background: none;
  border-radius: 2px;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--ink);
  line-height: 1;
}
.qty-controls span { font-size: 0.85rem; min-width: 1.2em; text-align: center; }

.cart-remove { background: none; border: none; font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-soft); cursor: pointer; text-decoration: underline; }

.cart-foot { border-top: 1px solid var(--line); padding: 1.5rem 1.8rem; }
.cart-subtotal { display: flex; justify-content: space-between; font-size: 0.9rem; font-weight: 600; margin-bottom: 1rem; }
.cart-foot .btn { width: 100%; }
.cart-note { font-size: 0.74rem; color: var(--ink-soft); margin-top: 0.9rem; text-align: center; }
.cart-note a { text-decoration: underline; }

/* ---- Interior pages + CTA banner ---------------------------------------------------------- */

.subpage-first { padding-top: calc(var(--nav-h) + 4.5rem); }

.page-title { font-size: clamp(2.3rem, 4.6vw, 3.4rem); }

.nav-links a[aria-current="page"] { color: var(--ink); }

.featured-more { text-align: center; margin-top: 3rem; }

.cta-banner {
  background: var(--ink);
  color: var(--ivory);
  text-align: center;
  padding-block: 6.5rem;
}
.cta-banner .eyebrow { color: var(--champagne); }
.cta-banner h2 { max-width: 16em; margin-inline: auto; }
.cta-banner p { color: rgba(247, 245, 240, 0.7); margin-top: 1rem; }
.cta-ctas { display: flex; justify-content: center; flex-wrap: wrap; gap: 0.9rem; margin-top: 2.4rem; }
.cta-banner .btn-primary { background: var(--champagne); border-color: var(--champagne); color: var(--ink); }
.cta-banner .btn-primary:hover { background: var(--ivory); border-color: var(--ivory); }
.cta-banner .btn-ghost { border-color: rgba(247, 245, 240, 0.45); color: var(--ivory); }
.cta-banner .btn-ghost:hover { background: var(--ivory); color: var(--ink); border-color: var(--ivory); }

/* ---- Mobile ----------------------------------------------------------------------------- */

@media (max-width: 900px) {
  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 0.5rem 24px 1rem;
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: 0.9rem 0; }
  .menu-btn { display: block; }

  .hero-art { opacity: 0.28; right: -18vw; }

  .trust-grid { grid-template-columns: 1fr 1fr; padding-block: 2rem; }
  .product-grid { grid-template-columns: 1fr 1fr; gap: 1.8rem 1.2rem; }
  .why-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .review-grid { grid-template-columns: 1fr; }
  .enquiry-grid { grid-template-columns: 1fr; gap: 3rem; }
  .footer-links { gap: 2.5rem; }
}

@media (max-width: 560px) {
  .product-grid { grid-template-columns: 1fr; }
  .trust-grid { grid-template-columns: 1fr; gap: 1.1rem; }
  .form-grid { grid-template-columns: 1fr; }
  .collection, .why, .compare, .reviews, .faq, .enquiry { padding-block: 4.5rem; }
  .cta-banner { padding-block: 4.5rem; }
  .subpage-first { padding-top: calc(var(--nav-h) + 3rem); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}