/* ═══════════════════════════════════════════════════════════════════
   GreyLabs Research — Public Website
   Aesthetic: research lab notebook / scientific journal
   - Off-white paper background, deep ink text
   - Serif for body, mono for data and headings
   - Sharp 1px lines, NO rounded blobs
   - One accent (deep indigo), one warning (oxblood)
   ═══════════════════════════════════════════════════════════════════ */

:root {
  --paper: #f5f3ed;
  --paper-dim: #ebe9e2;
  --ink: #1a1a1a;
  --ink-mid: #4a4a45;
  --ink-light: #807d75;
  --rule: #1a1a1a;
  --rule-light: #cfccc4;
  --accent: #1e3a8a;       /* deep indigo */
  --accent-hover: #142a66;
  --warning: #7c1d1d;      /* oxblood */
  --warning-bg: #f3e8e0;
  --ok: #2d5a2f;
  --ok-bg: #e6efde;
  --highlight: #fff3a8;    /* legal pad yellow, used sparingly */
  --serif: 'IBM Plex Serif', 'Iowan Old Style', 'Charter', Georgia, serif;
  --mono: 'IBM Plex Mono', 'SF Mono', Menlo, Consolas, monospace;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

/* Subtle paper grain — printed lines barely visible */
body::before {
  content: '';
  position: fixed; inset: 0; pointer-events: none;
  background-image: linear-gradient(0deg, transparent 31px, rgba(26,26,26,0.025) 32px);
  background-size: 100% 32px;
  z-index: 0;
}

a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
a:hover { color: var(--accent-hover); }

button { font-family: inherit; cursor: pointer; }

/* ── Layout ── */
.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}
.container.narrow { max-width: 680px; }

/* ── Header ── */
.site-header {
  border-bottom: 2px solid var(--rule);
  padding: 18px 0;
  background: var(--paper);
  position: sticky; top: 0; z-index: 10;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.brand { display: flex; align-items: baseline; gap: 12px; }
.brand-mark {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 2px;
  color: var(--accent);
  padding: 4px 8px;
  border: 1px solid var(--accent);
}
.brand-name {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.stage-track {
  display: flex;
  gap: 16px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ink-light);
  flex-wrap: wrap;
}
.stage { white-space: nowrap; }
.stage.current { color: var(--accent); font-weight: 700; border-bottom: 1px solid var(--accent); }
.stage.done { color: var(--ink); }

/* ── Views (state machine pages) ── */
.view {
  display: none;
  padding: 48px 0 80px;
  min-height: calc(100vh - 200px);
}
.view.active { display: block; }

/* ── Typography ── */
h1.hero-title {
  font-family: var(--mono);
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 24px 0 8px;
  line-height: 1.1;
}
h2 {
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 4px;
}
h3 {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin: 36px 0 12px;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 6px;
}
.lede {
  font-size: 19px;
  line-height: 1.6;
  color: var(--ink-mid);
  margin: 0 0 32px;
  max-width: 56ch;
}
.section-head { margin-bottom: 32px; }
.section-head h2 { margin-bottom: 8px; }
.section-head .muted { margin: 0; }
.muted { color: var(--ink-light); }
.small { font-size: 13px; }
.mono { font-family: var(--mono); }
.break { word-break: break-all; }
.center { text-align: center; justify-content: center; }

.prose p { margin: 0 0 16px; }
.prose ul, .prose ol { padding-left: 22px; margin: 0 0 16px; }
.prose li { margin: 6px 0; }

/* ── Warning stamp (lab-style) ── */
.warning-stamp {
  border: 2px solid var(--warning);
  padding: 16px 20px;
  margin: 16px 0 32px;
  background: var(--warning-bg);
  position: relative;
  transform: rotate(-0.5deg);
}
.stamp-line { height: 2px; background: var(--warning); margin: 6px 0; }
.stamp-line-thick { height: 3px; }
.stamp-text {
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--warning);
  text-align: center;
  margin: 8px 0;
}
.stamp-sub {
  text-align: center;
  font-size: 14px;
  color: var(--warning);
  margin: 4px 0 8px;
}

/* ── Tables ── */
.prose-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 15px;
}
.prose-table thead th {
  font-family: var(--mono);
  text-align: left;
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ink-light);
  padding: 8px 12px 8px 0;
  border-bottom: 2px solid var(--rule);
}
.prose-table tbody td {
  padding: 12px 12px 12px 0;
  border-bottom: 1px solid var(--rule-light);
  vertical-align: top;
}
.prose-table tbody tr:last-child td { border-bottom: none; }

/* Checklists w/ unicode markers */
.check-list { list-style: none; padding-left: 0; }
.check-list li {
  position: relative;
  padding-left: 22px;
  margin: 8px 0;
}
.check-list li::before {
  content: '☐';
  position: absolute;
  left: 0;
  font-family: var(--mono);
  color: var(--accent);
}
.numbered-list { padding-left: 22px; }
.numbered-list li { margin: 8px 0; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  text-decoration: none;
  transition: all 100ms ease-out;
  border-radius: 0;        /* sharp corners */
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn:disabled:hover { background: transparent; color: var(--ink); }

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

.btn-ghost { border-color: var(--rule-light); color: var(--ink-mid); }
.btn-ghost:hover { background: var(--paper-dim); color: var(--ink); }

.action-row {
  display: flex;
  gap: 12px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--rule-light);
  flex-wrap: wrap;
}
.action-row.center { justify-content: center; border-top: none; padding-top: 0; }

/* ── Catalog tabs ── */
.cat-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: 0 0 24px;
  border-bottom: 2px solid var(--rule);
}
.cat-tab {
  padding: 10px 16px;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.5px;
  color: var(--ink-light);
  cursor: pointer;
  transition: all 100ms;
  text-transform: uppercase;
}
.cat-tab:hover { color: var(--ink); }
.cat-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 700;
}

/* ── Product rows ── */
.product-block {
  margin-bottom: 32px;
}
.product-block-title {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--accent);
  padding: 6px 0;
  margin-bottom: 8px;
  border-bottom: 1px dashed var(--rule-light);
}
.product-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--rule-light);
}
.product-row:last-child { border-bottom: none; }
.product-meta { min-width: 0; }
.product-name {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 500;
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}
.product-name strong { font-weight: 700; }
.product-strength {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 13px;
  letter-spacing: 0.5px;
}
.product-desc {
  font-size: 14px;
  color: var(--ink-mid);
  margin-top: 4px;
  line-height: 1.4;
}
.product-price {
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 700;
  white-space: nowrap;
  text-align: right;
}
.product-price.had-promo {
  position: relative;
}
.product-price-was {
  display: block;
  font-size: 11px;
  color: var(--ink-light);
  text-decoration: line-through;
  margin-bottom: 2px;
}
.product-price-now { color: var(--accent); }
.product-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 6px;
}
.qty-stepper {
  display: inline-flex;
  border: 1px solid var(--rule-light);
}
.qty-stepper button {
  width: 28px; height: 28px;
  border: none;
  background: transparent;
  font-family: var(--mono);
  font-weight: 700;
  cursor: pointer;
}
.qty-stepper button:hover { background: var(--paper-dim); }
.qty-stepper input {
  width: 38px; height: 28px;
  border: none;
  border-left: 1px solid var(--rule-light);
  border-right: 1px solid var(--rule-light);
  text-align: center;
  font-family: var(--mono);
  font-size: 13px;
  background: transparent;
  -moz-appearance: textfield;
}
.qty-stepper input::-webkit-outer-spin-button,
.qty-stepper input::-webkit-inner-spin-button {
  -webkit-appearance: none; margin: 0;
}
.product-add {
  padding: 6px 14px;
  font-size: 11px;
  border: 1px solid var(--accent);
  background: transparent;
  color: var(--accent);
  font-family: var(--mono);
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 100ms;
}
.product-add:hover { background: var(--accent); color: var(--paper); }
.product-add.added { background: var(--ok); border-color: var(--ok); color: var(--paper); }

/* ── Cart ── */
.cart-item {
  display: grid;
  grid-template-columns: 1fr auto auto auto;
  gap: 16px;
  align-items: center;
  padding: 16px 0;
  border-bottom: 1px solid var(--rule-light);
}
.cart-item-name { font-family: var(--mono); font-size: 14px; }
.cart-item-name small { display: block; color: var(--ink-light); font-size: 12px; margin-top: 2px; }
.cart-item-qty { font-family: var(--mono); font-size: 13px; color: var(--ink-mid); }
.cart-item-price { font-family: var(--mono); font-weight: 700; font-size: 15px; min-width: 70px; text-align: right; }
.cart-item-remove {
  background: transparent;
  border: 1px solid var(--rule-light);
  color: var(--ink-light);
  font-family: var(--mono);
  font-size: 11px;
  padding: 4px 8px;
  cursor: pointer;
}
.cart-item-remove:hover { background: var(--warning); color: var(--paper); border-color: var(--warning); }
.cart-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--ink-light);
  font-style: italic;
}
.cart-summary {
  background: var(--paper-dim);
  padding: 20px 24px;
  border: 1px solid var(--rule);
  margin: 24px 0;
  font-family: var(--mono);
  font-size: 14px;
}
.cart-summary-row {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
}
.cart-summary-row.total {
  font-weight: 700;
  font-size: 16px;
  padding-top: 12px;
  margin-top: 8px;
  border-top: 1px solid var(--rule);
}
.cart-summary-row.muted { color: var(--ink-light); }

/* ── Form ── */
.form { display: flex; flex-direction: column; gap: 18px; margin-top: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field-row { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 14px; }
@media (max-width: 600px) { .field-row { grid-template-columns: 1fr; } }
.field label {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--ink-mid);
}
.req { color: var(--warning); }
.field input, .field select, .field textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--rule);
  background: var(--paper);
  font-family: var(--serif);
  font-size: 16px;
  color: var(--ink);
  border-radius: 0;
}
.field input:focus, .field select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: inset 0 -2px 0 var(--accent);
}
.field .hint { font-size: 12px; color: var(--ink-light); margin: 2px 0 0; font-family: var(--serif); }

.tos-field { padding: 14px 16px; border: 1px solid var(--rule-light); background: var(--paper-dim); }
.checkbox-label { display: flex; gap: 10px; align-items: flex-start; cursor: pointer; }
.checkbox-label input[type=checkbox] { margin-top: 4px; transform: scale(1.2); accent-color: var(--accent); }
.checkbox-label span { font-size: 14px; line-height: 1.4; }

.form-error {
  padding: 12px 16px;
  border: 1px solid var(--warning);
  background: var(--warning-bg);
  color: var(--warning);
  font-family: var(--mono);
  font-size: 13px;
}

/* ── Payment view ── */
.payment-card {
  border: 2px solid var(--rule);
  padding: 28px;
  background: var(--paper);
  margin: 24px 0;
}
.payment-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--rule-light);
  gap: 16px;
  flex-wrap: wrap;
}
.payment-row:last-of-type { border-bottom: none; }
.payment-row-emph { padding: 14px 0; }
.payment-row-emph .payment-value { font-size: 15px; }
.payment-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ink-light);
}
.payment-value { font-weight: 500; }
.payment-value.big { font-size: 22px !important; font-weight: 700; color: var(--accent); }

.qr-block { text-align: center; padding: 24px 0; border-top: 1px solid var(--rule-light); margin-top: 12px; }
.qr-block img { display: block; margin: 0 auto 12px; border: 1px solid var(--rule); }
.hint.center { text-align: center; }

.payment-status {
  padding: 12px 16px;
  margin: 16px 0 8px;
  border: 1px dashed var(--rule);
  font-family: var(--mono);
  font-size: 14px;
  text-align: center;
}
.payment-status.pending { border-color: #ad7700; color: #6b4a00; background: var(--highlight); }
.payment-status.confirmed { border-color: var(--ok); color: var(--ok); background: var(--ok-bg); }
.payment-status.underpaid { border-color: var(--warning); color: var(--warning); background: var(--warning-bg); }

.help-details {
  margin: 20px 0;
  padding: 12px 16px;
  border: 1px solid var(--rule-light);
}
.help-details summary {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  cursor: pointer;
  font-weight: 600;
}
.help-details[open] summary { margin-bottom: 8px; }

/* ── Confirmation ── */
.confirm-stamp {
  border: 3px double var(--ok);
  padding: 28px;
  text-align: center;
  margin: 32px 0;
  background: var(--ok-bg);
  transform: rotate(-0.5deg);
}
.confirm-stamp .stamp-line { background: var(--ok); margin: 8px 0; }
.confirm-title {
  font-family: var(--mono);
  color: var(--ok);
  letter-spacing: 4px;
  font-size: 24px;
}
.confirm-summary { font-size: 18px; }
.confirm-details {
  padding: 20px 24px;
  background: var(--paper-dim);
  border: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 14px;
  margin: 24px 0;
}
.confirm-row {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  border-bottom: 1px solid var(--rule-light);
  gap: 16px;
}
.confirm-row:last-child { border-bottom: none; }
.confirm-row > span:first-child {
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ink-light);
}

/* ── Footer ── */
.site-footer {
  border-top: 2px solid var(--rule);
  padding: 36px 0;
  margin-top: 60px;
  font-size: 13px;
  color: var(--ink-mid);
}
.footer-disclaimer { line-height: 1.5; margin-bottom: 16px; }
.footer-meta {
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ink-light);
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-meta a { color: var(--ink-light); }

/* ── Toast ── */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink);
  color: var(--paper);
  padding: 12px 24px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.5px;
  border-radius: 0;
  z-index: 100;
  animation: toast-in 200ms ease-out;
}
.toast.error { background: var(--warning); }
.toast.success { background: var(--ok); }
@keyframes toast-in {
  from { opacity: 0; transform: translateX(-50%) translateY(8px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

.loading {
  padding: 40px;
  text-align: center;
  color: var(--ink-light);
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 1px;
}

/* US-only labels: hidden when not US */
.us-only { display: none; }
body.country-us .us-only { display: inline; }

/* ── ToS page ── */
body.tos-page .container { max-width: 720px; padding-top: 40px; padding-bottom: 80px; }
body.tos-page h1 {
  font-family: var(--mono);
  font-size: 28px;
  margin-bottom: 4px;
}
body.tos-page h2 {
  margin-top: 36px;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 6px;
}
body.tos-page .updated { color: var(--ink-light); font-size: 14px; margin-bottom: 32px; }

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .warning-stamp, .confirm-stamp { transform: none; }
}