:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --text: #16181d;
  --text-muted: #565d6b;
  --border: #d8dbe2;
  --accent: #1f4b8f;
  --accent-contrast: #ffffff;
  --danger: #9a2f2f;
  --attention-bg: #fdf3e7;
  --attention-border: #d98d2b;
  --focus-ring: #1f4b8f;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12141a;
    --surface: #1b1e26;
    --text: #e7e9ee;
    --text-muted: #9aa2b1;
    --border: #333844;
    --accent: #6fa0e6;
    --accent-contrast: #0b1220;
    --danger: #e08585;
    --attention-bg: #2b2410;
    --attention-border: #b97a1f;
    --focus-ring: #6fa0e6;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.5;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--text);
}

button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

h1, h2, h3 { line-height: 1.25; }
h1 { font-size: 1.4rem; margin: 0.4em 0; }
h2 { font-size: 1.1rem; margin: 1em 0 0.4em; }
h3 { font-size: 0.95rem; margin: 0.6em 0 0.2em; color: var(--text-muted); }

.disclaimer {
  margin: 0 0 1rem;
  padding: 0.5rem 0.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.app-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1.25rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 5;
}
.brand { font-weight: 700; letter-spacing: 0.01em; }
.app-nav { display: flex; gap: 0.25rem; }
.nav-step {
  background: none;
  border: 1px solid transparent;
  border-radius: 5px;
  padding: 0.35rem 0.6rem;
  cursor: pointer;
  color: var(--text-muted);
}
.nav-step.active { color: var(--accent); border-color: var(--border); background: var(--bg); font-weight: 600; }
.nav-step:disabled { opacity: 0.4; cursor: not-allowed; }

.persistence-controls, .export-import-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
  flex-wrap: wrap;
}
.saved-status { font-size: 0.82rem; color: var(--text-muted); }

.screen-host { padding: 1.25rem; max-width: 1100px; margin: 0 auto; }

button {
  border-radius: 6px;
  border: 1px solid var(--border);
  padding: 0.45rem 0.85rem;
  cursor: pointer;
  background: var(--surface);
}
button.primary { background: var(--accent); color: var(--accent-contrast); border-color: var(--accent); font-weight: 600; }
button.secondary { background: var(--surface); }
button.danger { color: var(--danger); border-color: var(--danger); }
button:disabled { opacity: 0.45; cursor: not-allowed; }
button.icon-button { padding: 0.25rem 0.5rem; }

.field { margin: 0.6rem 0; display: flex; flex-direction: column; gap: 0.25rem; max-width: 420px; }
.field label { font-size: 0.85rem; color: var(--text-muted); }
input[type="text"], input[type="date"], textarea, select {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.45rem 0.6rem;
  background: var(--surface);
  color: var(--text);
}

fieldset { border: 1px solid var(--border); border-radius: 8px; padding: 0.75rem 1rem; margin: 0.75rem 0; }
fieldset legend { color: var(--text-muted); font-size: 0.85rem; padding: 0 0.3rem; }
fieldset label { display: flex; align-items: center; gap: 0.4rem; margin: 0.3rem 0; }

.editable-list { list-style: none; padding: 0; margin: 0.4rem 0; }
.editable-row { display: flex; gap: 0.4rem; align-items: center; padding: 0.35rem 0; border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.editable-row input[type="text"] { flex: 1 1 160px; }
.required-toggle { display: flex; align-items: center; gap: 0.3rem; font-size: 0.85rem; color: var(--text-muted); white-space: nowrap; }
.field-error { color: var(--danger); font-size: 0.85rem; }
.hint { color: var(--text-muted); font-size: 0.85rem; }
.paste-box { display: flex; flex-direction: column; gap: 0.4rem; max-width: 480px; }
.paste-box textarea { border: 1px solid var(--border); border-radius: 6px; padding: 0.5rem; }

/* --- Mapping matrix --- */
.live-summary {
  font-weight: 600;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  display: inline-block;
}
.live-summary.attention { background: var(--attention-bg); border-color: var(--attention-border); }

.matrix-wrapper, table.matrix {
  display: block;
}
table.matrix {
  width: 100%;
  border-collapse: collapse;
  margin: 0.75rem 0;
  overflow-x: auto;
  display: block;
}
table.matrix thead, table.matrix tbody { display: table; width: 100%; table-layout: fixed; }
table.matrix th, table.matrix td { border: 1px solid var(--border); padding: 0.5rem; vertical-align: top; text-align: left; }
table.matrix th[scope="row"] {
  position: sticky;
  left: 0;
  background: var(--bg);
  min-width: 160px;
  z-index: 1;
}
.column-active { background: var(--surface); min-width: 220px; }
.column-collapsed { min-width: 110px; color: var(--text-muted); }
.column-header-button { width: 100%; background: none; border: none; text-align: left; cursor: pointer; font-weight: 600; }
.cell-active { background: var(--surface); }
.cell-collapsed { color: var(--text-muted); font-size: 0.9rem; }
.row-focused th[scope="row"] { outline: 2px solid var(--focus-ring); outline-offset: -2px; }
.badge { display: inline-block; font-size: 0.7rem; padding: 0.1rem 0.4rem; border-radius: 999px; margin-left: 0.4rem; vertical-align: middle; }
.badge-attention { background: var(--attention-bg); color: var(--attention-border); border: 1px solid var(--attention-border); }

/* A compact horizontal row keeps the whole matrix scannable — a tall stack
   of 6 buttons per active row forced heavy scrolling on ordinary loops. */
.verdict-group { display: flex; flex-direction: row; flex-wrap: wrap; gap: 0.3rem; align-items: center; }
.verdict-button { text-align: center; padding: 0.35rem 0.55rem; font-size: 0.85rem; white-space: nowrap; }
.verdict-button.selected { background: var(--accent); color: var(--accent-contrast); border-color: var(--accent); }
.verdict-clear { color: var(--text-muted); padding: 0.35rem 0.55rem; font-size: 0.85rem; }

.unmapped-topics { margin: 1rem 0; padding: 0.75rem; border: 1px dashed var(--border); border-radius: 8px; max-width: 480px; }
.unmapped-list { margin: 0 0 0.5rem; padding-left: 1.2rem; }

/* --- Brief --- */
.brief-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 1rem; }
.brief { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 1.25rem; max-width: 760px; }
.brief-eyebrow { margin: 0; text-transform: uppercase; letter-spacing: 0.06em; font-size: 0.72rem; color: var(--text-muted); font-weight: 600; }
.brief-header h1 { margin: 0.15em 0 0.2em; }
.brief-meta { color: var(--text-muted); font-size: 0.85rem; }
.brief-block { margin: 0 0 1.1rem; }
.brief-block h2 { text-transform: uppercase; letter-spacing: 0.03em; font-size: 0.85rem; border-bottom: 1px solid var(--border); padding-bottom: 0.25rem; }
.brief-clear { color: #2f6f4f; font-weight: 600; }
.brief-footer { border-top: 1px solid var(--border); padding-top: 0.5rem; margin-top: 1rem; }
.brief-footer p { font-style: italic; color: var(--text-muted); font-size: 0.85rem; margin: 0; }

/* --- Decision --- */
.field-errors { color: var(--danger); font-size: 0.85rem; }
.chip-input-row { display: flex; gap: 0.4rem; max-width: 420px; }
.chip-input-row input { flex: 1; }
.chip-list { list-style: none; padding: 0; margin: 0.5rem 0 0; display: flex; flex-wrap: wrap; gap: 0.4rem; }
.chip {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.2rem 0.3rem 0.2rem 0.7rem;
  font-size: 0.85rem;
}
.chip-remove { border: none; background: none; padding: 0.1rem 0.4rem; border-radius: 999px; color: var(--text-muted); cursor: pointer; }
.chip-remove:hover { color: var(--danger); }
.locked-record { display: grid; grid-template-columns: max-content 1fr; gap: 0.3rem 1rem; max-width: 640px; }
.locked-record dt { color: var(--text-muted); }
.locked-record .hash { font-family: ui-monospace, SFMono-Regular, monospace; font-size: 0.8rem; word-break: break-all; }
.disposition-list { margin: 0; padding-left: 1.1rem; }
.disposition-list li { margin: 0 0 0.3rem; }
.amendments { padding-left: 1.2rem; }

.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

@media (max-width: 640px) {
  .app-header { flex-direction: column; align-items: stretch; }
  .persistence-controls, .export-import-controls { margin-left: 0; }
  .screen-host { padding: 0.75rem; }
  table.matrix { font-size: 0.85rem; }
}

@media print {
  .app-header, .brief-actions, .disclaimer { display: none !important; }
  .screen-host { padding: 0; max-width: none; }
  .brief { border: none; box-shadow: none; }
}