/* itcost UI (Prompt 154 Part A3) -- tokens-based, dark + light, phone-first.
   Palette follows the O Center dark family plus a validated light mode and
   the dataviz skill's status colors (good/warning/serious/critical), kept
   as fixed roles never reused for a chart series. */

:root {
  color-scheme: light;
  --surface-page: #f9f9f7;
  --surface-1: #fcfcfb;
  --surface-2: #ffffff;
  --text-primary: #0b0b0b;
  --text-secondary: #52514e;
  --text-muted: #898781;
  --border: rgba(11, 11, 11, 0.12);
  --border-strong: #c3c2b7;
  --accent: #2a78d6;
  --accent-ink: #ffffff;
  --good: #0ca30c;
  --warning: #b8860b;
  --serious: #c0562f;
  --critical: #c23232;
  --focus-ring: #2a78d6;
  --chip-bg: #eef1f6;
}

@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --surface-page: #0d0d0d;
    --surface-1: #15161a;
    --surface-2: #1b1d22;
    --text-primary: #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted: #8c8f98;
    --border: rgba(255, 255, 255, 0.12);
    --border-strong: #383835;
    --accent: #4a8ef0;
    --accent-ink: #ffffff;
    --good: #22c55e;
    --warning: #eab308;
    --serious: #ec835a;
    --critical: #e66767;
    --focus-ring: #4a8ef0;
    --chip-bg: #22252c;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --surface-page: #0d0d0d;
  --surface-1: #15161a;
  --surface-2: #1b1d22;
  --text-primary: #ffffff;
  --text-secondary: #c3c2b7;
  --text-muted: #8c8f98;
  --border: rgba(255, 255, 255, 0.12);
  --border-strong: #383835;
  --accent: #4a8ef0;
  --accent-ink: #ffffff;
  --good: #22c55e;
  --warning: #eab308;
  --serious: #ec835a;
  --critical: #e66767;
  --focus-ring: #4a8ef0;
  --chip-bg: #22252c;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--surface-page);
  color: var(--text-primary);
  overflow-x: hidden;
}

a { color: var(--accent); }

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--surface-2);
  color: var(--text-primary);
  padding: 8px 12px;
  z-index: 100;
}
.skip-link:focus { left: 8px; top: 8px; }

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

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px 16px;
  background: var(--surface-1);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar-left { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.brand { font-weight: 700; font-size: 16px; white-space: nowrap; }
.topnav { display: flex; gap: 4px; flex-wrap: wrap; }
.topnav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 6px 10px;
  border-radius: 6px;
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 14px;
}
.topnav a:hover, .topnav a.active { background: var(--chip-bg); color: var(--text-primary); }
.topbar-right { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.user-badge { font-size: 13px; color: var(--text-secondary); }

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px;
  width: 100%;
}

h1 { font-size: 22px; margin: 0 0 12px; }
h2 { font-size: 17px; margin: 24px 0 8px; }
h3 { font-size: 15px; margin: 16px 0 6px; }

.btn, button, input[type="submit"] {
  font: inherit;
  min-height: 44px;
  padding: 8px 14px;
  border-radius: 6px;
  border: 1px solid var(--border-strong);
  background: var(--surface-2);
  color: var(--text-primary);
  cursor: pointer;
}
a.btn {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  box-sizing: border-box;
}
.btn:disabled, button:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary, button.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent);
}
.btn-danger { border-color: var(--critical); color: var(--critical); background: transparent; }
.btn-small { min-height: 36px; padding: 4px 10px; font-size: 13px; }

input[type="text"], input[type="password"], input[type="date"], input[type="number"],
input[type="search"], input[type="file"], select, textarea {
  font: inherit;
  min-height: 44px;
  padding: 6px 10px;
  border-radius: 6px;
  border: 1px solid var(--border-strong);
  background: var(--surface-2);
  color: var(--text-primary);
  max-width: 100%;
}
textarea { min-height: 70px; }
label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--text-secondary); margin-bottom: 8px; }

.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  margin-bottom: 16px;
}

.table-scroll { width: 100%; overflow-x: auto; border: 1px solid var(--border); border-radius: 8px; }
table { border-collapse: collapse; width: 100%; font-size: 13px; }
th, td { padding: 8px 10px; text-align: left; border-bottom: 1px solid var(--border); white-space: nowrap; }
tbody tr:hover { background: var(--chip-bg); }
th { color: var(--text-secondary); font-weight: 600; position: sticky; top: 0; background: var(--surface-1); }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid var(--border);
}
.badge-info { color: var(--text-secondary); }
.badge-warning { color: var(--warning); border-color: var(--warning); }
.badge-error, .badge-critical { color: var(--critical); border-color: var(--critical); }
.badge-good { color: var(--good); border-color: var(--good); }
.badge::before { content: ""; }
.badge-info::before { content: "i "; }
.badge-warning::before { content: "\26A0 "; }
.badge-error::before, .badge-critical::before { content: "\2715 "; }
.badge-good::before { content: "\2713 "; }

.chip-row { display: flex; gap: 6px; flex-wrap: wrap; margin: 8px 0; }
.chip {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: var(--surface-2);
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
}
.chip.active { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }

.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.tile {
  display: block;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  background: var(--surface-1);
  text-decoration: none;
  color: var(--text-primary);
}
.tile-month { font-weight: 700; font-size: 15px; }
.tile-status { font-size: 12px; margin-top: 4px; }
.tile-gap { border-style: dashed; color: var(--text-muted); }
.tile[data-status="approved"] { border-color: var(--good); }
.tile[data-status="diff-ready"] { border-color: var(--warning); }
.tile[data-status="draft"] { border-color: var(--border-strong); }

.dropzone {
  border: 2px dashed var(--border-strong);
  border-radius: 10px;
  padding: 20px;
  text-align: center;
  color: var(--text-secondary);
}
.dropzone.dragover { border-color: var(--accent); background: var(--chip-bg); }

.progress { height: 10px; border-radius: 6px; background: var(--chip-bg); overflow: hidden; margin: 8px 0; }
.progress-bar { height: 100%; background: var(--accent); width: 0%; transition: width 0.15s ease; }

.sticky-bar {
  position: sticky;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  margin-top: 16px;
}
.sticky-bar.can-approve { border-color: var(--good); }
.sticky-bar.cannot-approve { border-color: var(--critical); }

.stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 16px; }
.stat-tile { background: var(--surface-1); border: 1px solid var(--border); border-radius: 10px; padding: 12px; }
.stat-value { font-size: 22px; font-weight: 700; font-variant-numeric: tabular-nums; }
.stat-label { font-size: 12px; color: var(--text-secondary); }

.inline-form { display: flex; gap: 8px; flex-wrap: wrap; align-items: flex-end; }
.field-group { display: flex; flex-direction: column; }

.readonly-banner {
  background: var(--chip-bg);
  border: 1px solid var(--good);
  border-radius: 8px;
  padding: 10px 14px;
  margin-bottom: 12px;
  font-size: 13px;
}

.error-banner {
  background: var(--chip-bg);
  border: 1px solid var(--critical);
  color: var(--critical);
  border-radius: 8px;
  padding: 10px 14px;
  margin-bottom: 12px;
  font-size: 13px;
}

.login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 16px; }
.login-form { width: 100%; max-width: 360px; display: flex; flex-direction: column; gap: 10px; }
.login-error { color: var(--critical); font-size: 13px; }

.hidden { display: none !important; }

svg.chart { width: 100%; height: auto; max-width: 100%; }
.chart text { fill: var(--text-secondary); font-size: 11px; }
.chart .bar { fill: var(--accent); }
.chart .axis { stroke: var(--border-strong); }

.theme-toggle { min-height: 44px; }

.insight-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.insight-item {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  background: var(--surface-2);
}
.insight-item p { margin: 6px 0; }
.evidence-chip-row { margin: 6px 0 0; }
.evidence-chip { min-height: 32px; padding: 2px 10px; font-size: 12px; }
.evidence-detail {
  margin-top: 6px;
  padding: 8px 10px;
  border-radius: 6px;
  background: var(--chip-bg);
  font-size: 12px;
}
.app-footer {
  text-align: center;
  padding: 16px;
  font-size: 12px;
  color: var(--text-muted);
}

@media (max-width: 480px) {
  main { padding: 12px; }
  .topbar { padding: 8px 12px; }
  th, td { padding: 8px; }
}