/* Design tokens. Light by default, dark via prefers-color-scheme. Contrast of every text/background pair is tested in test/styles.contrast.test.ts. */
:root {
  color-scheme: light dark;
  --color-bg: #f4f6f9;
  --color-surface: #ffffff;
  --color-text: #14181f;
  --color-muted: #4a5565;
  --color-border: #c9d0da;
  --color-border-strong: #6b7686;
  --color-primary: #1a56db;
  --color-primary-hover: #1646b4;
  --color-primary-text: #ffffff;
  --color-link: #1a56db;
  --color-danger: #b42318;
  --color-danger-text: #ffffff;
  --color-focus: #1a56db;
  --color-ok-bg: #dcf5e3;
  --color-ok-text: #0b5d27;
  --color-warn-bg: #fdecc8;
  --color-warn-text: #6b4100;
  --color-error-bg: #fde0dd;
  --color-error-text: #8f1d12;
  --color-info-bg: #dce8ff;
  --color-info-text: #14377d;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.75rem;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2.5rem;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --tap: 44px;
  --content-width: 60rem;
  --reading-width: 44rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0f131a;
    --color-surface: #181e28;
    --color-text: #e8ecf2;
    --color-muted: #a3adbc;
    --color-border: #3a4455;
    --color-border-strong: #8591a3;
    --color-primary: #7aa2ff;
    --color-primary-hover: #9bb9ff;
    --color-primary-text: #0b1220;
    --color-link: #8fb3ff;
    --color-danger: #ff8a80;
    --color-danger-text: #1c0502;
    --color-focus: #9bb9ff;
    --color-ok-bg: #123d22;
    --color-ok-text: #9be7b2;
    --color-warn-bg: #4a3508;
    --color-warn-text: #ffd98a;
    --color-error-bg: #4d1a16;
    --color-error-text: #ffb4ab;
    --color-info-bg: #172f5c;
    --color-info-text: #b8d0ff;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font: var(--font-size-base) / 1.5 var(--font-body); background: var(--color-bg); color: var(--color-text); }
img, svg { max-width: 100%; height: auto; }
h1 { font-size: var(--font-size-xl); line-height: 1.2; margin: var(--space-4) 0; }
h2 { font-size: var(--font-size-lg); line-height: 1.3; margin: var(--space-5) 0 var(--space-3); }
h3 { font-size: var(--font-size-base); margin: var(--space-4) 0 var(--space-1); }
p { margin: 0 0 var(--space-3); }
a { color: var(--color-link); text-underline-offset: 0.15em; }
code { font-family: var(--font-mono); font-size: 0.9em; background: var(--color-bg); border: 1px solid var(--color-border); padding: 0 var(--space-1); border-radius: var(--radius-sm); overflow-wrap: anywhere; }
[hidden] { display: none !important; }
.muted { color: var(--color-muted); }
.visually-hidden { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 2px; }
.skip-link { position: absolute; left: var(--space-2); top: -4rem; z-index: 10; padding: var(--space-2) var(--space-4); background: var(--color-surface); border: 2px solid var(--color-focus); border-radius: var(--radius-md); }
.skip-link:focus { top: var(--space-2); }

/* Layout */
.container { max-width: var(--content-width); margin-inline: auto; padding-inline: var(--space-4); }
main { padding-block: var(--space-4) var(--space-5); }
main.public { max-width: var(--reading-width); }
main.login { max-width: 26rem; margin-top: var(--space-6); text-align: center; }
.site-header { background: var(--color-surface); border-bottom: 1px solid var(--color-border); }
.site-header-inner { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2) var(--space-4); padding-block: var(--space-2); }
.brand { display: inline-flex; align-items: center; gap: var(--space-2); min-height: var(--tap); font-weight: 700; font-size: var(--font-size-lg); color: var(--color-text); text-decoration: none; }
.nav { flex: 1 1 auto; }
.nav ul { display: flex; flex-wrap: wrap; gap: var(--space-1); list-style: none; margin: 0; padding: 0; }
.nav a { display: inline-flex; align-items: center; min-height: var(--tap); padding-inline: var(--space-3); border-radius: var(--radius-md); color: var(--color-text); text-decoration: none; }
.nav a:hover { background: var(--color-bg); }
.nav a[aria-current="page"] { font-weight: 700; box-shadow: inset 0 -3px 0 var(--color-primary); border-radius: 0; }
.account { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); margin-left: auto; min-width: 0; }
.account .muted { overflow-wrap: anywhere; }
.logout-form { margin: 0; }
.site-footer { margin-top: var(--space-5); padding: var(--space-3) 0; text-align: center; color: var(--color-muted); font-size: var(--font-size-sm); }
.site-footer a { display: inline-flex; align-items: center; min-height: var(--tap); padding-inline: var(--space-2); }

/* Buttons */
button, .btn, a.button { display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2); min-height: var(--tap); padding: var(--space-2) var(--space-4); font: inherit; font-weight: 600; line-height: 1.2; color: var(--color-primary-text); background: var(--color-primary); border: 2px solid var(--color-primary); border-radius: var(--radius-md); text-decoration: none; cursor: pointer; }
button:hover, .btn:hover, a.button:hover { background: var(--color-primary-hover); border-color: var(--color-primary-hover); }
.btn-secondary { color: var(--color-text); background: var(--color-surface); border-color: var(--color-border-strong); }
.btn-secondary:hover { background: var(--color-bg); border-color: var(--color-border-strong); }
.btn-danger { color: var(--color-danger-text); background: var(--color-danger); border-color: var(--color-danger); }
.btn-danger:hover { background: var(--color-danger); border-color: var(--color-danger); filter: brightness(0.92); }
button:disabled, [aria-disabled="true"] { cursor: not-allowed; opacity: 0.65; }
[aria-busy="true"], [aria-busy="true"] button { cursor: progress; }
button[disabled][data-busy] { opacity: 0.8; }

/* Fields */
form label { display: grid; gap: var(--space-1); font-weight: 600; }
input, select, textarea { width: 100%; min-height: var(--tap); padding: var(--space-2) var(--space-3); font: inherit; font-size: 1rem; color: var(--color-text); background: var(--color-surface); border: 1px solid var(--color-border-strong); border-radius: var(--radius-md); }
textarea { min-height: 7rem; resize: vertical; }
select { padding-right: var(--space-2); }
input[type="file"] { padding: var(--space-2); }
.missing, input.missing, select.missing { border: 2px solid var(--color-danger); }
label.missing { color: var(--color-error-text); }
.required { font-weight: 400; color: var(--color-error-text); background: var(--color-error-bg); padding: 0 var(--space-1); border-radius: var(--radius-sm); font-size: var(--font-size-sm); }
details { border: 1px solid var(--color-border); border-radius: var(--radius-md); padding-inline: var(--space-3); }
details[open] { padding-bottom: var(--space-3); display: grid; gap: var(--space-3); }
summary { display: flex; align-items: center; min-height: var(--tap); cursor: pointer; font-weight: 600; }

/* Cards and forms */
.card, #upload-form, .edit-form, .steps, .plan { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-4); }
#upload-form, .edit-form { display: grid; gap: var(--space-3); }
.steps { padding-left: var(--space-6); }
.steps li { margin-bottom: var(--space-2); }
.plan { margin-top: var(--space-4); }
.plan-person h3 { margin-bottom: 0; }
.actions { display: flex; flex-wrap: wrap; gap: var(--space-3); align-items: center; }
.actions a:not(.btn) { display: inline-flex; align-items: center; min-height: var(--tap); }
.back-link { display: inline-flex; align-items: center; min-height: var(--tap); }

/* Alerts and badges */
.flash { padding: var(--space-3) var(--space-4); border-radius: var(--radius-md); border: 1px solid transparent; color: var(--color-info-text); background: var(--color-info-bg); }
.flash.ok { color: var(--color-ok-text); background: var(--color-ok-bg); }
.flash.warn { color: var(--color-warn-text); background: var(--color-warn-bg); }
.flash.error { color: var(--color-error-text); background: var(--color-error-bg); }
.flash a { color: inherit; font-weight: 600; }
.flash code { color: inherit; background: transparent; border-color: currentColor; }
.badge { display: inline-block; padding: 0 var(--space-2); border-radius: 999px; font-size: var(--font-size-sm); font-weight: 600; color: var(--color-info-text); background: var(--color-info-bg); white-space: nowrap; }
.badge-received, .badge-processing { color: var(--color-info-text); background: var(--color-info-bg); }
.badge-filed { color: var(--color-ok-text); background: var(--color-ok-bg); }
.badge-needs_review { color: var(--color-warn-text); background: var(--color-warn-bg); }
.badge-sync_pending { color: var(--color-info-text); background: var(--color-info-bg); }
.badge-failed { color: var(--color-error-text); background: var(--color-error-bg); }
.note { display: block; color: var(--color-muted); overflow-wrap: anywhere; }
.note.error { color: var(--color-error-text); }
.history { list-style: none; margin: 0; padding: 0; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.history li { padding: var(--space-2) var(--space-3); border-bottom: 1px solid var(--color-border); font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.history li:last-child { border-bottom: 0; }
#history { margin-top: var(--space-5); }

/* Tables */
.table-wrap { border: 1px solid var(--color-border); border-radius: var(--radius-lg); background: var(--color-surface); overflow: hidden; }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: var(--space-2) var(--space-3); border-bottom: 1px solid var(--color-border); vertical-align: top; overflow-wrap: anywhere; }
.table th { font-size: var(--font-size-sm); color: var(--color-muted); }
.table tbody tr:last-child td { border-bottom: 0; }
.num { text-align: right !important; font-variant-numeric: tabular-nums; }
.fix-form, .retry-form { display: flex; gap: var(--space-2); margin: 0; align-items: center; }
.fix-form select { min-width: 8rem; }
.row-actions { display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: center; }
.edit-link, .file-link { display: inline-flex; align-items: center; justify-content: center; min-height: var(--tap); min-width: var(--tap); }
.empty { padding: var(--space-5); text-align: center; color: var(--color-muted); background: var(--color-surface); border: 1px dashed var(--color-border-strong); border-radius: var(--radius-lg); }

/* Pagination */
.pagination { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-3); margin-top: var(--space-4); }
.pagination-status { color: var(--color-muted); }

@media (max-width: 639px) {
  main { padding-block: var(--space-3) var(--space-4); }
  h1 { font-size: 1.5rem; }
  .account { margin-left: 0; width: 100%; justify-content: space-between; }
  .table-stack thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .table-stack, .table-stack tbody, .table-stack tr, .table-stack td { display: block; width: 100%; }
  .table-stack tr { padding: var(--space-2) 0; border-bottom: 1px solid var(--color-border); }
  .table-stack tbody tr:last-child { border-bottom: 0; }
  .table-stack td { display: flex; justify-content: space-between; gap: var(--space-3); border: 0; padding: var(--space-1) var(--space-3); text-align: right; }
  .table-stack td > * { max-width: 70%; }
  .table-stack td::before { content: attr(data-label); flex: 0 0 5.5rem; font-weight: 600; color: var(--color-muted); text-align: left; }
  .table-stack td.num { text-align: right !important; }
  .table-stack .fix-form { flex-wrap: wrap; justify-content: flex-end; }
  .table-stack .status, .table-stack .supplier { align-items: flex-start; }
  .pagination { justify-content: center; }
  .pagination-status { order: -1; width: 100%; text-align: center; }
}

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

/* Categories page */
.picker { display: flex; flex-wrap: wrap; gap: var(--space-3); align-items: end; margin-bottom: var(--space-4); }
.picker label { flex: 1 1 12rem; }
.categories td { vertical-align: middle; }
.categories td.num, .categories th.num { white-space: nowrap; overflow-wrap: normal; }
.inline-form { display: inline-flex; flex-wrap: wrap; gap: var(--space-2); margin: 0 var(--space-2) var(--space-2) 0; }
.inline-form input { width: 12rem; }

dl.details { display: grid; grid-template-columns: max-content 1fr; gap: var(--space-2) var(--space-4); margin-block: var(--space-4); }
dl.details dt { color: var(--color-muted); }
dl.details dd { margin: 0; }