/* ===========================================================
   Aminose — brand identity system
   carbon / parchment / amber, IBM Plex Mono + IBM Plex Sans
   =========================================================== */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@300;400;600&family=IBM+Plex+Sans:ital,wght@0,200;0,300;0,400;1,200&family=Inter:wght@400;500;600;700&family=Playfair+Display:wght@400;600&display=swap');

:root {
  --ink:      #1a1814;
  --obsidian: #2e2c28;
  --paper:    #f2efe8;
  --warm-mid: #c8bfaf;
  --accent:   #4d422f; /* darkened from #6b5d42 for legibility — contrast on paper now ~8.6:1 (AAA) */
  --faint:    #e4e0d8;
  --white:    #faf9f6;
  --max: 920px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'Inter', 'IBM Plex Sans', sans-serif;
  font-weight: 400;
  letter-spacing: 0.01em;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .wordmark, .nav-link, .btn, .p-name {
  font-family: 'IBM Plex Mono', monospace;
}

footer.site-footer {
  font-family: 'Inter', 'IBM Plex Sans', sans-serif;
}

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

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 32px;
}

/* ---------- disclaimer bar ---------- */
.disclaimer-bar {
  background: var(--ink);
  color: var(--warm-mid);
  text-align: center;
  font-size: 10.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  padding: 10px 16px;
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 300;
}

/* ---------- header ---------- */
header.site-header {
  padding: 30px 0;
  border-bottom: 1px solid var(--warm-mid);
}

.site-header .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
}

.wordmark {
  font-size: 19px;
  letter-spacing: 0.28em;
  font-weight: 300;
  text-transform: lowercase;
  display: flex;
  align-items: center;
}

.wordmark span {
  color: var(--accent);
}

.wordmark svg {
  display: block;
  height: 58px;
  width: auto;
}

nav.main-nav {
  display: flex;
  gap: 28px;
}

.nav-link {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  transition: color 0.2s ease;
}

.nav-link:hover, .nav-link.active { color: var(--ink); }

.cart-badge {
  font-family: 'IBM Plex Mono', monospace;
  color: inherit;
}

/* ---------- hero (single column, inner pages) ---------- */
.hero {
  padding: 90px 0 70px;
  text-align: center;
}

.hero .eyebrow {
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(2.6rem, 5vw, 3.6rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  margin: 0 0 22px;
  line-height: 1.15;
}

.hero p {
  max-width: 560px;
  margin: 0 auto 34px;
  color: var(--obsidian);
  font-size: 15px;
  line-height: 1.8;
}

/* ---------- split hero (homepage) ---------- */
.hero-split {
  min-height: 78vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-bottom: 1px solid var(--warm-mid);
}

.hero-split-left {
  padding: 4.4rem 3rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-right: 1px solid var(--warm-mid);
}

.hero-split-label {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 2.2rem;
}

.hero-split-title {
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 700;
  font-size: clamp(2.6rem, 5.4vw, 4.4rem);
  letter-spacing: -0.01em;
  line-height: 1.05;
}

.hero-split-title .acc { color: var(--accent); }

.hero-split-sub {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--obsidian);
  margin-top: 2rem;
  max-width: 34ch;
  line-height: 1.9;
}

.hero-split-cta {
  margin-top: auto;
  padding-top: 3rem;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-split-right {
  background: var(--ink);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 3rem;
  position: relative;
  overflow: hidden;
  min-height: 320px;
}

.chain-wrap {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.14;
}

.chain-wrap svg { width: 100%; height: 100%; }

.hero-split-right-inner {
  position: relative;
  z-index: 2;
  text-align: center;
}

.molecule-label {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 10.5px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--warm-mid);
  margin-bottom: 1.8rem;
}

.big-formula {
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 300;
  font-size: clamp(0.85rem, 2vw, 1.3rem);
  letter-spacing: 0.1em;
  color: var(--paper);
  line-height: 2.1;
  white-space: pre;
}

.big-formula .hi { color: #b8a880; }

/* ---------- buttons ---------- */
.btn {
  display: inline-block;
  padding: 13px 30px;
  border: 1px solid var(--ink);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: lowercase;
  color: var(--ink);
  background: transparent;
  transition: background 0.2s ease, color 0.2s ease;
  font-weight: 300;
  cursor: pointer;
}

.btn:hover { background: var(--ink); color: var(--paper); }

.btn-quiet {
  border-color: var(--warm-mid);
  color: var(--accent);
}

.btn-quiet:hover { border-color: var(--ink); background: var(--ink); color: var(--paper); }

.btn-disabled {
  border-color: var(--warm-mid);
  color: var(--warm-mid);
  cursor: not-allowed;
}
.btn-disabled:hover { background: transparent; color: var(--warm-mid); }

/* on the dark hero panel */
.hero-split-right .btn {
  border-color: var(--warm-mid);
  color: var(--paper);
}
.hero-split-right .btn:hover { background: var(--paper); color: var(--ink); }

/* ---------- section ---------- */
section { padding: 64px 0; }

.section-head {
  text-align: center;
  margin-bottom: 48px;
}

.section-head .label {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-head h1,
.section-head h2 {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin: 0;
}

.divider {
  border: none;
  border-top: 1px solid var(--warm-mid);
  margin: 0;
}

/* ---------- steps ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--warm-mid);
}

.step {
  text-align: left;
  padding: 2.2rem 2rem;
  border-right: 1px solid var(--warm-mid);
}

.step:last-child { border-right: none; }

.step .num {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.step h3 {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin: 0 0 12px;
}

.step p {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 13px;
  color: var(--obsidian);
  line-height: 1.8;
  margin: 0;
}

/* ---------- product list ---------- */
.product-list {
  border-top: 1px solid var(--warm-mid);
}

.product-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 24px 0;
  border-bottom: 1px solid var(--warm-mid);
}

.product-row .p-name {
  font-size: 16px;
  letter-spacing: 0.03em;
  font-weight: 300;
}

.product-row .p-meta {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 11.5px;
  color: var(--accent);
  margin-top: 7px;
  letter-spacing: 0.04em;
}

.product-row .p-price {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 16px;
  letter-spacing: 0.04em;
  white-space: nowrap;
  padding-left: 24px;
  color: var(--obsidian);
}

.product-row a.p-link { flex: 1; display: flex; justify-content: space-between; align-items: baseline; }

/* ---------- product icon grid (clickable product-selection style) ---------- */
.product-icon-grid {
  display: grid;
  /* Grid's auto-fill track count is computed off the definite upper bound
     (260px here), not the lower one — keep that <=260 so 3 columns fit
     inside the 856px content width (920px wrap minus its padding). */
  grid-template-columns: repeat(auto-fill, minmax(220px, 260px));
  justify-content: center;
  gap: 24px;
  padding: 8px 0 4px;
}

.product-icon-grid.small {
  grid-template-columns: repeat(auto-fill, minmax(160px, 190px));
  justify-content: center;
  gap: 18px;
}

.product-icon-card {
  display: flex;
  flex-direction: column;
  text-align: left;
  text-decoration: none;
  color: inherit;
  background: #fff;
  border: 1px solid var(--warm-mid);
  border-radius: 14px;
  overflow: hidden;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.product-icon-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(43, 39, 64, 0.12);
  border-color: var(--accent);
}

.product-icon-thumb {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  background: var(--paper);
  border-bottom: 1px solid var(--warm-mid);
}

.product-icon-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.product-icon-purity {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.04em;
  padding: 4px 9px;
  border-radius: 20px;
  border: 1px solid var(--warm-mid);
}

.product-icon-body {
  padding: 14px 16px 18px;
}

.product-icon-grid.small .product-icon-body {
  padding: 10px 12px 14px;
}

.product-icon-name {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.product-icon-grid.small .product-icon-name {
  font-size: 13px;
}

.product-icon-cat {
  margin-top: 3px;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 12px;
  color: var(--accent);
}

.product-icon-price {
  margin-top: 8px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
}

/* ---------- product detail ---------- */
.product-detail {
  padding: 70px 0 90px;
}

.product-hero-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 48px;
  align-items: start;
}

.product-hero-img {
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--warm-mid);
  position: sticky;
  top: 24px;
}

.product-hero-img img {
  width: 100%;
  display: block;
}

.product-detail .p-category {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
}

.product-detail .p-category a {
  color: inherit;
  text-decoration: none;
}

.product-detail .p-category a:hover {
  text-decoration: underline;
}

.product-detail h1 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 300;
  letter-spacing: 0;
  text-transform: none;
  margin: 0 0 8px;
}

.product-detail .p-size {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 32px;
  letter-spacing: 0.04em;
}

.product-detail p.desc {
  max-width: 620px;
  line-height: 1.9;
  color: var(--obsidian);
  margin-bottom: 34px;
  font-size: 14.5px;
}

.spec-table {
  width: 100%;
  max-width: 620px;
  border-top: 1px solid var(--warm-mid);
  margin-bottom: 36px;
}

.spec-row {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 20px;
  padding: 15px 0;
  border-bottom: 1px solid var(--warm-mid);
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 13px;
}

.spec-row .k {
  color: var(--accent);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 10.5px;
  flex-shrink: 0;
}

.product-note {
  background: var(--faint);
  border: 1px solid var(--warm-mid);
  padding: 18px 22px;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 12px;
  color: var(--obsidian);
  line-height: 1.8;
  max-width: 620px;
  margin-bottom: 34px;
}

/* ---------- quantity + add to order ---------- */
.add-order-row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.qty-select {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  padding: 12px 34px 12px 14px;
  border: 1px solid var(--warm-mid);
  background-color: var(--white);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%238a7a5a'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  color: var(--ink);
  cursor: pointer;
}

.added-note {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 12px;
  color: var(--accent);
  line-height: 1.8;
  margin-bottom: 30px;
}

.added-note a { text-decoration: underline; }

/* ---------- order / cart page ---------- */
.cart-row {
  display: grid;
  grid-template-columns: 1fr 110px 90px 70px;
  align-items: center;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--warm-mid);
}

.cart-row-name {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 15px;
}

.cart-row-meta {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 11.5px;
  color: var(--accent);
  margin-top: 5px;
}

.cart-row-price {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 14px;
  text-align: right;
}

.cart-row-remove .cart-remove-link {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
}

.cart-row-remove .cart-remove-link:hover { color: var(--ink); }

.cart-total-row {
  display: flex;
  justify-content: space-between;
  padding: 22px 0 0;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 16px;
  letter-spacing: 0.03em;
}

.order-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin: 34px 0;
}

/* ---------- research references ---------- */
.refs-block {
  max-width: 620px;
  margin-bottom: 40px;
}

.refs-head {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent);
  border-top: 1px solid var(--warm-mid);
  padding-top: 22px;
  margin-bottom: 14px;
}

.refs-intro {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 12px;
  color: var(--accent);
  line-height: 1.8;
  margin: 0 0 18px;
  max-width: 56ch;
}

.refs-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.ref-item {
  padding: 14px 0;
  border-bottom: 1px solid var(--warm-mid);
}

.ref-item a {
  display: block;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 13.5px;
  color: var(--ink);
  line-height: 1.6;
  margin-bottom: 5px;
}

.ref-item a:hover { color: var(--accent); }

.ref-item .ref-source {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}

/* ---------- forms ---------- */
.form-wrap {
  max-width: 640px;
}

.field {
  margin-bottom: 22px;
}

.field label {
  display: block;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 9px;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--warm-mid);
  background: var(--white);
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 13.5px;
  color: var(--ink);
}

.field textarea { min-height: 110px; resize: vertical; }

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.checkbox-field {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 12.5px;
  color: var(--obsidian);
  line-height: 1.7;
  margin-bottom: 26px;
}

.checkbox-field input { margin-top: 4px; }

.form-note {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 11.5px;
  color: var(--accent);
  margin-top: 16px;
  line-height: 1.7;
}

/* ---------- legal / long text pages ---------- */
.legal-content h2 {
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 300;
  margin: 40px 0 12px;
  color: var(--accent);
}

.legal-content p, .legal-content li {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--obsidian);
}

.legal-content ul { padding-left: 20px; }

.faq-item {
  border-bottom: 1px solid var(--warm-mid);
  padding: 16px 0;
}

.faq-item summary {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::before {
  content: '+';
  display: inline-block;
  width: 16px;
  color: var(--accent);
  font-weight: 400;
}

.faq-item[open] summary::before { content: '\2212'; }

.faq-item p {
  margin: 10px 0 0 16px;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--obsidian);
}

/* ---------- footer ---------- */
footer.site-footer {
  border-top: 1px solid var(--warm-mid);
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 32px;
  padding: 50px 0 34px;
}

.footer-grid h4 {
  font-family: 'Inter', 'IBM Plex Sans', sans-serif;
  font-size: 13px;
  letter-spacing: 0.02em;
  font-weight: 600;
  color: var(--ink);
  margin: 0 0 14px;
}

.footer-grid a, .footer-grid p {
  display: block;
  font-family: 'Inter', 'IBM Plex Sans', sans-serif;
  font-size: 13px;
  font-weight: 400;
  color: var(--obsidian);
  margin-bottom: 9px;
  line-height: 1.7;
}

.footer-legal {
  font-family: 'Inter', 'IBM Plex Sans', sans-serif;
  font-size: 11px;
  color: var(--accent);
  line-height: 1.9;
  border-top: 1px solid var(--warm-mid);
  padding: 24px 0;
}

.footer-legal .copyright {
  margin-top: 14px;
  letter-spacing: 0.04em;
}

.footer-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 0;
  border-top: 1px solid var(--warm-mid);
  font-family: 'Inter', 'IBM Plex Sans', sans-serif;
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--accent);
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- misc ---------- */
.center { text-align: center; }

.hero-cta-row {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

@media (max-width: 800px) {
  .hero-split { grid-template-columns: 1fr; min-height: auto; }
  .hero-split-left { border-right: none; border-bottom: 1px solid var(--warm-mid); }
  .steps { grid-template-columns: 1fr; }
  .step { border-right: none; border-bottom: 1px solid var(--warm-mid); }
  .footer-grid { grid-template-columns: 1fr; }
  .field-row { grid-template-columns: 1fr; }
  .cart-row { grid-template-columns: 1fr; gap: 8px; }
  .cart-row-price { text-align: left; }
  .product-hero-layout { grid-template-columns: 1fr; }
  .product-hero-img { max-width: 220px; position: static; margin: 0 auto 12px; }
}