/* ============ Design tokens ============ */
:root {
  --paper: #f6f4ef;
  --paper-deep: #efece4;
  --surface: #fffdf9;
  --ink: #21201c;
  --ink-soft: #5b584f;
  --ink-faint: #8b8779;
  --line: #e2ddd0;
  --line-strong: #cfc9b8;
  --accent: #1e5f4d;
  --accent-deep: #174a3c;
  --accent-tint: #e3ede8;
  --accent-soft: #f0f6f2;
  --danger: #a83b32;
  --danger-tint: #f7e8e6;
  --gold: #8a6d1f;
  --radius-lg: 14px;
  --radius-md: 10px;
  --radius-sm: 7px;
  --shadow-soft: 0 1px 2px rgba(33, 32, 28, 0.05), 0 10px 30px -18px rgba(33, 32, 28, 0.35);
  --shadow-pop: 0 24px 70px -30px rgba(23, 42, 36, 0.45);
  --font-ui: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", system-ui, sans-serif;
  --font-num: "SF Mono", "Cascadia Mono", ui-monospace, "PingFang SC", monospace;
}

* { box-sizing: border-box; }

/* Author display rules (e.g. .preview-loading's flex) would otherwise override
   the UA stylesheet and keep [hidden] elements visible. */
[hidden] { display: none !important; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-ui);
  color: var(--ink);
  background:
    radial-gradient(1100px 500px at 85% -10%, rgba(30, 95, 77, 0.07), transparent 60%),
    var(--paper);
  -webkit-font-smoothing: antialiased;
  min-height: 100dvh;
}

h1, h2, h3 { line-height: 1.25; text-wrap: balance; }
p { text-wrap: pretty; }

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

::selection { background: var(--accent-tint); }

/* ============ Buttons ============ */
.btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font: 500 14px/1.2 var(--font-ui);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease,
    transform 0.12s ease, box-shadow 0.18s ease;
}

.btn:active { transform: translateY(1px) scale(0.99); }

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background: var(--accent);
  color: #f7fbf9;
  box-shadow: 0 1px 0 rgba(23, 74, 60, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}
.btn-primary:hover:not(:disabled) { background: var(--accent-deep); }

.btn-secondary {
  background: var(--surface);
  color: var(--ink);
  border-color: var(--line-strong);
}
.btn-secondary:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent-deep);
  background: var(--accent-soft);
}

.btn-ghost {
  background: transparent;
  color: var(--ink-soft);
  border-color: transparent;
}
.btn-ghost:hover:not(:disabled) {
  background: rgba(33, 32, 28, 0.06);
  color: var(--ink);
}

.btn-sm { padding: 5px 10px; font-size: 13px; border-radius: 6px; }

.btn-block { width: 100%; }

.btn-danger-quiet {
  background: transparent;
  border-color: transparent;
  color: var(--danger);
  padding: 5px 10px;
  font-size: 13px;
  border-radius: 6px;
}
.btn-danger-quiet:hover:not(:disabled) { background: var(--danger-tint); }
.btn-danger-quiet:disabled { opacity: 0.4; cursor: not-allowed; }

/* ============ Topbar ============ */
.topbar {
  background: rgba(255, 253, 249, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
}

.topbar-inner {
  max-width: 1320px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }

.brand-mark { width: 36px; height: 36px; flex: none; }

.brand-text { display: flex; flex-direction: column; line-height: 1.3; min-width: 0; }
.brand-text strong { font-size: 15px; letter-spacing: 0.01em; }
.brand-text span { font-size: 12px; color: var(--ink-faint); }

.topbar-actions { display: flex; align-items: center; gap: 8px; }

.seal-status {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--accent-tint);
  color: var(--accent-deep);
  margin-right: 4px;
}
.seal-status.seal-status-missing { background: var(--danger-tint); color: var(--danger); }

/* ============ Page scaffold ============ */
.page {
  max-width: 1320px;
  margin: 0 auto;
  padding: 28px 24px 64px;
}

.page-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.tabs {
  display: inline-flex;
  padding: 4px;
  gap: 4px;
  background: var(--paper-deep);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.tab {
  appearance: none;
  border: none;
  background: transparent;
  padding: 9px 22px;
  font: 600 15px/1 var(--font-ui);
  color: var(--ink-soft);
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
}
.tab:hover { color: var(--ink); }
.tab.active {
  background: var(--surface);
  color: var(--accent-deep);
  box-shadow: 0 1px 2px rgba(33, 32, 28, 0.12);
}

.page-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.search {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-right: 8px;
}

.search input {
  width: 250px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong);
  background: var(--surface);
  font: 14px var(--font-ui);
  color: var(--ink);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}
.search input::placeholder { color: var(--ink-faint); }
.search input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-tint);
}

/* ============ Table ============ */
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover:not(:disabled) { background: #8e3029; }
.table-selection { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--line); }
.selection-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.data-table .selection-cell { width: 44px; text-align: center; }
.selection-cell input { width: 16px; height: 16px; accent-color: var(--accent); cursor: pointer; vertical-align: middle; }
.data-table tbody tr.row-selected { background: var(--accent-tint); }

.table-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.table-scroll { overflow-x: auto; }

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.data-table th {
  text-align: left;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
  background: linear-gradient(var(--paper), var(--paper-deep));
  border-bottom: 1px solid var(--line);
  padding: 11px 14px;
  white-space: nowrap;
}

.data-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
  color: var(--ink);
}

.data-table tbody tr { transition: background 0.15s ease; }
.data-table tbody tr:hover { background: var(--accent-soft); }
.data-table tbody tr:last-child td { border-bottom: none; }

.td-num, .td-cert-no { font-variant-numeric: tabular-nums; }

.td-cert-no { font-family: var(--font-num); font-size: 13px; letter-spacing: 0.02em; }

.td-actions {
  white-space: nowrap;
  display: flex;
  gap: 6px;
}

.badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 6px;
  font-size: 12.5px;
  background: var(--accent-tint);
  color: var(--accent-deep);
}
.badge-category { background: var(--paper-deep); color: var(--ink-soft); }
.badge-issued {
  background: var(--accent-tint);
  color: var(--accent-deep);
}
.badge-unissued {
  background: var(--paper-deep);
  color: var(--ink-faint);
}

.table-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  background: linear-gradient(var(--surface), var(--paper));
  flex-wrap: wrap;
}

.summary-text { font-size: 13px; color: var(--ink-faint); font-variant-numeric: tabular-nums; }

.pagination { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }

.pagination button {
  appearance: none;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--ink-soft);
  min-width: 32px;
  height: 32px;
  padding: 0 10px;
  border-radius: 7px;
  font: 500 13px var(--font-num);
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}
.pagination button:hover:not(:disabled) { border-color: var(--accent); color: var(--accent-deep); }
.pagination button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #f7fbf9;
}
.pagination button:disabled { opacity: 0.35; cursor: not-allowed; }

.page-ellipsis { color: var(--ink-faint); padding: 0 4px; }

/* ============ Empty state ============ */
.empty-state {
  text-align: center;
  padding: 56px 24px;
  color: var(--ink-soft);
}
.empty-state h3 { margin: 0 0 6px; font-size: 17px; color: var(--ink); }
.empty-state p { margin: 0; font-size: 14px; color: var(--ink-faint); }

/* ============ Modals ============ */
.modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(30, 32, 28, 0.45);
  backdrop-filter: blur(3px);
}
.modal[hidden] { display: none; }

.modal-box {
  width: min(560px, 100%);
  max-height: min(88dvh, 900px);
  overflow: auto;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-pop);
}

.modal-wide .modal-box { width: min(1080px, 100%); }
.modal-sm .modal-box { width: min(440px, 100%); }

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: var(--surface);
  z-index: 1;
}
.modal-head h3 { margin: 0; font-size: 16px; }

.modal-close {
  appearance: none;
  border: none;
  background: transparent;
  font-size: 24px;
  line-height: 1;
  color: var(--ink-faint);
  cursor: pointer;
  padding: 2px 8px;
  border-radius: 6px;
  transition: background 0.15s ease, color 0.15s ease;
}
.modal-close:hover { background: var(--paper-deep); color: var(--ink); }

.modal-body { padding: 20px; }

.modal-foot {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 20px;
}

.modal-note {
  margin: 0 0 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
  background: var(--accent-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
}

/* ============ Forms ============ */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 16px;
}
.form-grid .span-2 { grid-column: span 2; }

.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.field label { font-size: 13px; font-weight: 500; color: var(--ink-soft); }
.field label em { font-style: normal; color: var(--danger); }

.field input, .field select {
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong);
  background: #fff;
  font: 14px var(--font-ui);
  color: var(--ink);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}
.field input:focus, .field select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-tint);
}

.form-error {
  margin: 0 0 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--danger);
  background: var(--danger-tint);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
}

.file-input {
  display: block;
  width: 100%;
  font: 13px var(--font-ui);
  color: var(--ink-soft);
  padding: 10px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--paper);
  cursor: pointer;
}
.file-input::file-selector-button {
  appearance: none;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--ink);
  border-radius: 6px;
  padding: 6px 12px;
  font: 500 13px var(--font-ui);
  margin-right: 12px;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.file-input::file-selector-button:hover { border-color: var(--accent); color: var(--accent-deep); }

/* ============ Seal modal ============ */
.seal-state { font-size: 14px; margin-bottom: 12px; }
.seal-state .ok { color: var(--accent-deep); font-weight: 500; }
.seal-state .missing { color: var(--danger); font-weight: 500; }

.seal-preview-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 16px;
  margin-bottom: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background:
    repeating-conic-gradient(var(--paper) 0% 25%, var(--surface) 0% 50%) 0 0 / 22px 22px;
}
.seal-preview-wrap img {
  width: 150px;
  height: 150px;
  object-fit: contain;
  filter: drop-shadow(0 4px 10px rgba(33, 32, 28, 0.18));
}
.seal-meta { font-size: 12px; color: var(--ink-faint); margin: 0; }

/* ============ Preview modal ============ */
.preview-body { display: flex; flex-direction: column; align-items: center; gap: 12px; }

.preview-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 60px 0;
  color: var(--ink-faint);
  font-size: 14px;
}
.preview-loading p { margin: 0; }

.spinner {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 3px solid var(--accent-tint);
  border-top-color: var(--accent);
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

#previewImg {
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
}

/* ============ Login page ============ */
.login-page { display: flex; align-items: center; justify-content: center; }

.login-backdrop {
  position: fixed;
  inset: 0;
  background: var(--paper);
  z-index: -2;
}
.login-backdrop::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(1200px 600px at 20% 0%, rgba(30, 95, 77, 0.10), transparent 55%);
}
.login-backdrop::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("/bg.png");
  background-size: cover;
  background-position: center;
  opacity: 0.5;
  mask-image: linear-gradient(105deg, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.45) 48%, rgba(0,0,0,0.12) 100%);
  -webkit-mask-image: linear-gradient(105deg, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.45) 48%, rgba(0,0,0,0.12) 100%);
}

.login-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(340px, 440px);
  gap: 56px;
  align-items: center;
  width: min(1120px, calc(100% - 48px));
  min-height: 100dvh;
  padding: 48px 0;
}

.login-hero { color: var(--ink); }

.login-hero-inner { max-width: 520px; }

.login-hero-kicker {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.32em;
  color: var(--accent-deep);
  background: var(--accent-tint);
  padding: 5px 14px 5px 17px;
  border-radius: 999px;
  margin-bottom: 18px;
}

.login-hero h1 {
  margin: 0 0 14px;
  font-size: clamp(30px, 4.2vw, 46px);
  line-height: 1.15;
  letter-spacing: 0.01em;
}

.login-hero p {
  margin: 0 0 24px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 46ch;
}

.login-hero-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 14px;
  color: var(--ink-soft);
}
.login-hero-points li { display: flex; align-items: center; gap: 10px; }
.login-hero-points li::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--accent);
  flex: none;
}

.login-panel {
  background: rgba(255, 253, 249, 0.96);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow-pop);
  padding: 34px 32px 26px;
  backdrop-filter: blur(10px);
}

.login-panel-head { margin-bottom: 24px; }
.login-panel-head h2 { margin: 0 0 6px; font-size: 22px; }
.login-panel-head p { margin: 0; font-size: 13.5px; color: var(--ink-faint); line-height: 1.6; }

.login-form .field { margin-bottom: 16px; }

.login-form input {
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong);
  background: #fff;
  font: 14px var(--font-ui);
  color: var(--ink);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}
.login-form input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-tint);
}

.login-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 20px 0;
  color: var(--ink-faint);
  font-size: 12.5px;
}
.login-divider::before, .login-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.login-foot {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--ink-faint);
  text-align: center;
}

/* ============ Lookup page ============ */
.lookup-main { padding-top: 48px; }

.lookup-hero { text-align: center; max-width: 640px; margin: 0 auto 36px; }
.lookup-hero h1 { margin: 0 0 10px; font-size: clamp(26px, 3.4vw, 36px); }
.lookup-hero > p {
  margin: 0 0 24px;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.lookup-form {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
}
.lookup-form input {
  flex: 1 1 320px;
  max-width: 460px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line-strong);
  background: var(--surface);
  font: 15px var(--font-ui);
  color: var(--ink);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}
.lookup-form input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-tint);
}

#lookupError { max-width: 460px; margin: 14px auto 0; text-align: left; }

.lookup-results { max-width: 980px; margin: 0 auto; }

.results-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}
.results-head h2 { margin: 0; font-size: 18px; }

.result-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.result-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow-soft);
  transition: border-color 0.18s ease, transform 0.18s ease;
}
.result-card:hover { border-color: var(--accent); transform: translateY(-2px); }

.result-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.result-card h3 { margin: 0; font-size: 15px; line-height: 1.5; text-align: center; overflow-wrap: anywhere; }

.result-card dl {
  margin: 0;
  display: grid;
  gap: 6px;
  font-size: 13px;
  text-align: center;
}
.result-card-detail { display: flex; justify-content: center; align-items: baseline; gap: 14px; }
.result-card dt { color: var(--ink-faint); white-space: nowrap; }
.result-card dd { margin: 0; min-width: 0; overflow-wrap: anywhere; color: var(--ink-soft); font-variant-numeric: tabular-nums; }

.result-card .td-cert-no { color: var(--ink); }

.result-card-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px; margin-top: auto; }

/* ============ Responsive ============ */
@media (max-width: 960px) {
  .login-shell {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 32px 0;
  }
  .login-hero-inner { max-width: none; }
}

@media (max-width: 720px) {
  .topbar-inner { padding: 10px 16px; flex-wrap: wrap; }
  .page { padding: 20px 16px 48px; }
  .page-head { flex-direction: column; align-items: stretch; }
  .page-tools { justify-content: flex-end; }
  .search { flex: 1 1 100%; margin-right: 0; }
  .search input { width: 100%; min-width: 0; flex: 1; }
  .form-grid { grid-template-columns: 1fr; }
  .form-grid .span-2 { grid-column: span 1; }
  .table-foot { justify-content: center; }
}