/* ============================================================================
   TARIFF CROSSWALK — China ↔ Indonesia
   Aesthetic: Editorial / institutional. Inspired by trade-document typography,
   ledger-grid layouts, and Bloomberg-style data density. Serif headlines for
   gravitas, monospace for codes (so digits are easy to scan & verify).
   ============================================================================ */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600;9..144,700&family=Geist:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --ink: #1a1a1a;
  --ink-soft: #4a4a4a;
  --ink-faint: #8a8a8a;
  --paper: #f7f4ed;
  --paper-warm: #efeae0;
  --paper-card: #ffffff;
  --rule: #2d2d2d;
  --rule-soft: #d4cfc4;
  --accent-cn: #c8102e;     /* PRC red */
  --accent-id: #ce1126;     /* Indonesia red */
  --accent-gold: #b8860b;
  --accent-blue: #0a3d62;
  --good: #1e6b3a;
  --warn: #b06a00;
  --bad: #8b1e1e;

  --serif: 'Fraunces', 'Iowan Old Style', Georgia, serif;
  --sans: 'Geist', -apple-system, sans-serif;
  --mono: 'JetBrains Mono', 'SF Mono', Consolas, monospace;
}

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

html, body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Subtle paper grain — adds atmosphere without distracting */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 25% 30%, rgba(0,0,0,.015) 1px, transparent 1px),
    radial-gradient(circle at 75% 70%, rgba(0,0,0,.012) 1px, transparent 1px);
  background-size: 4px 4px, 6px 6px;
  pointer-events: none;
  z-index: 0;
}

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 32px;
  position: relative;
  z-index: 1;
}

/* ---------- HEADER / MASTHEAD ---------- */
.masthead {
  border-bottom: 2px solid var(--rule);
  padding: 36px 0 24px;
  margin-bottom: 40px;
}

.masthead-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 16px;
}

.masthead-top .vol { color: var(--ink-soft); }

h1.title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(40px, 6vw, 64px);
  line-height: 1.0;
  letter-spacing: -0.02em;
  font-variation-settings: "opsz" 144;
  color: var(--ink);
}

h1.title .accent {
  font-style: italic;
  font-weight: 400;
  color: var(--accent-blue);
  position: relative;
}

.subtitle {
  font-family: var(--serif);
  font-style: italic;
  font-size: 19px;
  font-weight: 400;
  color: var(--ink-soft);
  margin-top: 14px;
  max-width: 720px;
  letter-spacing: -0.005em;
}

.flags {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin-top: 18px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.flag-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
  margin-right: 6px;
  vertical-align: middle;
}
.flag-dot.cn { background: var(--accent-cn); }
.flag-dot.id { background: var(--accent-id); }
.flag-arrow { color: var(--ink-faint); font-family: var(--serif); }

/* ---------- API KEY PANEL ---------- */
.api-panel {
  background: var(--paper-warm);
  border: 1px solid var(--rule-soft);
  border-left: 3px solid var(--accent-gold);
  padding: 18px 22px;
  margin-bottom: 28px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px 20px;
  align-items: center;
}

.api-panel-info {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.5;
}

.api-panel-info strong {
  font-family: var(--serif);
  font-weight: 600;
  color: var(--ink);
  font-size: 14px;
}

.api-panel-info code {
  font-family: var(--mono);
  font-size: 12px;
  background: rgba(0,0,0,.04);
  padding: 1px 5px;
  border-radius: 2px;
}

.api-controls {
  display: flex;
  gap: 8px;
  align-items: center;
}

#api-key {
  font-family: var(--mono);
  font-size: 12px;
  padding: 8px 12px;
  border: 1px solid var(--rule-soft);
  background: white;
  width: 280px;
  outline: none;
}
#api-key:focus { border-color: var(--accent-blue); }

#save-key {
  background: var(--rule);
  color: white;
  border: none;
  padding: 8px 16px;
  font-family: var(--sans);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: .04em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background .2s;
}
#save-key:hover { background: var(--accent-blue); }

.key-status {
  grid-column: 1 / -1;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-faint);
}
.key-status.saved { color: var(--good); }

.ai-toggle-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--ink-soft);
}

/* ---------- SEARCH PANEL ---------- */
.search-panel {
  background: var(--paper-card);
  border: 1px solid var(--rule);
  padding: 28px 32px;
  margin-bottom: 12px;
  position: relative;
}

.search-panel::before {
  content: "§ 01";
  position: absolute;
  top: -10px;
  left: 24px;
  background: var(--paper);
  padding: 0 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--ink-faint);
}

.search-row {
  display: grid;
  grid-template-columns: 200px 1fr auto;
  gap: 0;
  align-items: stretch;
  border: 1px solid var(--rule);
}

.country-select-wrap {
  position: relative;
  border-right: 1px solid var(--rule);
  background: var(--paper-warm);
}

#source-country {
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
  border: none;
  width: 100%;
  height: 100%;
  padding: 18px 36px 18px 18px;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 500;
  color: var(--ink);
  cursor: pointer;
  outline: none;
}

.country-select-wrap::after {
  content: "▾";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--ink-faint);
  font-size: 12px;
}

#target-country-label {
  position: absolute;
  bottom: 4px;
  left: 18px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

#query {
  border: none;
  outline: none;
  padding: 18px 22px;
  font-family: var(--sans);
  font-size: 16px;
  background: white;
  color: var(--ink);
}
#query::placeholder { color: var(--ink-faint); font-style: italic; }

.submit-btn {
  background: var(--ink);
  color: var(--paper);
  border: none;
  padding: 0 32px;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: .12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background .2s;
}
.submit-btn:hover { background: var(--accent-blue); }

/* ---------- EXAMPLE CHIPS ---------- */
.examples {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
  align-items: center;
}

.examples-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-right: 4px;
}

.example-chip {
  background: transparent;
  border: 1px solid var(--rule-soft);
  padding: 6px 12px;
  font-family: var(--sans);
  font-size: 12px;
  color: var(--ink-soft);
  cursor: pointer;
  transition: all .15s;
  border-radius: 0;
}
.example-chip:hover {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.example-chip code {
  font-family: var(--mono);
  font-size: 11px;
  margin-right: 4px;
  color: var(--accent-blue);
}
.example-chip:hover code { color: #ffd700; }

/* ---------- LOADER ---------- */
.loader {
  display: none;
  text-align: center;
  padding: 32px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.loader.active { display: block; }
.loader::after {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-left: 8px;
  background: var(--ink);
  border-radius: 50%;
  animation: pulse 1s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 0.2; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1.2); }
}

/* ---------- RESULTS ---------- */
.results {
  margin-top: 32px;
}

.results-header {
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 14px 0;
  margin-bottom: 20px;
}

.results-meta {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.route {
  color: var(--ink);
  font-weight: 600;
}

.query-echo {
  color: var(--ink-soft);
  text-transform: none;
  letter-spacing: 0;
  font-size: 12px;
  font-family: var(--sans);
  font-style: italic;
}

.engine-badge {
  margin-left: auto;
  padding: 3px 8px;
  border: 1px solid var(--rule-soft);
  font-size: 10px;
}
.engine-badge.ai { border-color: var(--accent-blue); color: var(--accent-blue); }
.engine-badge.lex { color: var(--ink-faint); }

/* ---------- MATCH CARDS ---------- */
.match-card {
  background: var(--paper-card);
  border: 1px solid var(--rule-soft);
  margin-bottom: 16px;
  transition: border-color .2s, transform .2s;
  position: relative;
}
.match-card:hover {
  border-color: var(--rule);
}
.match-card.rank-1 {
  border-color: var(--rule);
  border-left: 4px solid var(--accent-gold);
}

.match-head {
  display: grid;
  grid-template-columns: 60px 1fr 280px;
  gap: 20px;
  padding: 18px 22px;
  border-bottom: 1px dashed var(--rule-soft);
  align-items: center;
}

.rank-badge {
  font-family: var(--serif);
  font-size: 32px;
  font-weight: 600;
  color: var(--ink-faint);
  font-variation-settings: "opsz" 144;
}
.match-card.rank-1 .rank-badge { color: var(--accent-gold); }

.match-codes {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.primary-code {
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.hs-anchor {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: .04em;
  text-transform: uppercase;
}

.confidence-block {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.conf-bar {
  height: 4px;
  background: var(--rule-soft);
  position: relative;
  overflow: hidden;
}
.conf-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--bad) 0%, var(--warn) 50%, var(--good) 100%);
  transition: width .6s cubic-bezier(.2,.8,.2,1);
}

.conf-text {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-soft);
}
.conf-text strong { color: var(--ink); font-size: 13px; }

.label-pill {
  display: inline-block;
  padding: 2px 8px;
  font-family: var(--sans);
  font-size: 10px;
  letter-spacing: .08em;
  text-transform: uppercase;
  font-weight: 600;
  border: 1px solid;
}
.label-pill.exact-match { color: var(--good); border-color: var(--good); }
.label-pill.likely-match { color: var(--accent-blue); border-color: var(--accent-blue); }
.label-pill.partial-match { color: var(--warn); border-color: var(--warn); }
.label-pill.manual-review-required { color: var(--bad); border-color: var(--bad); background: rgba(139,30,30,.04); }

.match-body {
  padding: 18px 22px 20px;
}

.match-desc {
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.45;
  color: var(--ink);
  margin-bottom: 16px;
  letter-spacing: -0.005em;
}

.tariff-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 2fr;
  gap: 0;
  border: 1px solid var(--rule-soft);
  background: var(--paper-warm);
  margin-bottom: 16px;
}

.tariff-cell {
  padding: 10px 14px;
  border-right: 1px solid var(--rule-soft);
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.tariff-cell:last-child { border-right: none; }

.tariff-label {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.tariff-value {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}
.tariff-notes .tariff-value {
  font-family: var(--sans);
  font-weight: 400;
  font-size: 12px;
  font-style: italic;
  color: var(--ink-soft);
}

.explanation {
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink-soft);
  padding: 12px 14px;
  background: rgba(10,61,98,.04);
  border-left: 2px solid var(--accent-blue);
  margin-bottom: 12px;
}
.explanation strong {
  color: var(--accent-blue);
  font-family: var(--sans);
  font-weight: 600;
}

.divergence-warning {
  font-size: 12px;
  color: var(--warn);
  padding: 10px 14px;
  background: rgba(176,106,0,.06);
  border-left: 2px solid var(--warn);
  margin-bottom: 12px;
  font-style: italic;
}

.sources {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding-top: 10px;
  border-top: 1px dashed var(--rule-soft);
}
.src-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.src-tag {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-soft);
  padding: 2px 6px;
  background: var(--paper-warm);
  border: 1px solid var(--rule-soft);
}

/* ---------- ACFTA FOOTER ---------- */
.acfta-footer {
  margin-top: 24px;
  padding: 16px 22px;
  background: var(--paper-warm);
  border: 1px solid var(--rule-soft);
  border-left: 3px solid var(--accent-gold);
  font-family: var(--serif);
  font-style: italic;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--ink-soft);
}

/* ---------- EMPTY/ERROR ---------- */
.empty-state, .error-card {
  padding: 32px;
  text-align: center;
  font-family: var(--serif);
  font-style: italic;
  color: var(--ink-soft);
  background: var(--paper-card);
  border: 1px dashed var(--rule-soft);
}
.error-card {
  color: var(--bad);
  border-color: var(--bad);
  background: rgba(139,30,30,.03);
}

/* ---------- FOOTER ---------- */
footer.colophon {
  margin-top: 60px;
  padding: 24px 0 40px;
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--ink-faint);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

footer.colophon a {
  color: var(--ink-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 720px) {
  .wrap { padding: 0 18px; }
  .api-panel { grid-template-columns: 1fr; }
  .api-controls { flex-wrap: wrap; }
  #api-key { width: 100%; }
  .search-row { grid-template-columns: 1fr; }
  .country-select-wrap { border-right: none; border-bottom: 1px solid var(--rule); }
  .submit-btn { padding: 16px; }
  .match-head { grid-template-columns: 1fr; gap: 12px; }
  .tariff-grid { grid-template-columns: 1fr 1fr; }
  .tariff-notes { grid-column: 1 / -1; border-top: 1px solid var(--rule-soft); }
}