:root {
  color-scheme: light;
  --surface-1:      #fcfcfb;
  --surface-2:      #f2f1ee;
  --page-plane:     #f9f9f7;
  --text-primary:   #0b0b0b;
  --text-secondary: #52514e;
  --text-muted:     #898781;
  --gridline:       #e1e0d9;
  --baseline:       #c3c2b7;
  --border:         rgba(11, 11, 11, 0.10);

  --series-1:       #2a78d6; /* blue */
  --series-1-wash:  rgba(42, 120, 214, 0.10);

  --status-good:     #0ca30c;
  --status-warning:  #fab219;
  --status-serious:  #ec835a;
  --status-critical: #d03b3b;

  --success-text: #006300;
}

@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --surface-1:      #1a1a19;
    --surface-2:      #232322;
    --page-plane:     #0d0d0d;
    --text-primary:   #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted:     #898781;
    --gridline:       #2c2c2a;
    --baseline:       #383835;
    --border:         rgba(255, 255, 255, 0.10);

    --series-1:       #3987e5;
    --series-1-wash:  rgba(57, 135, 229, 0.14);

    --status-good:     #0ca30c;
    --status-warning:  #fab219;
    --status-serious:  #ec835a;
    --status-critical: #d03b3b;

    --success-text: #0ca30c;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --surface-1:      #1a1a19;
  --surface-2:      #232322;
  --page-plane:     #0d0d0d;
  --text-primary:   #ffffff;
  --text-secondary: #c3c2b7;
  --text-muted:     #898781;
  --gridline:       #2c2c2a;
  --baseline:       #383835;
  --border:         rgba(255, 255, 255, 0.10);

  --series-1:       #3987e5;
  --series-1-wash:  rgba(57, 135, 229, 0.14);
  --success-text: #0ca30c;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--page-plane);
  color: var(--text-primary);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}

body { padding-bottom: 64px; }

h1, h2, h3, p { margin: 0; }

.btn {
  font: inherit;
  border-radius: 8px;
  padding: 8px 16px;
  cursor: pointer;
  border: 1px solid transparent;
}
.btn--primary {
  background: var(--series-1);
  color: #fff;
  border-color: var(--series-1);
}
.btn--ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
}
.btn--ghost:hover { background: var(--surface-2); }

/* ---------- Header ---------- */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 32px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-1);
  flex-wrap: wrap;
}
.app-header__title h1 { font-size: 20px; font-weight: 600; }
.app-header__subtitle { color: var(--text-secondary); font-size: 13px; margin-top: 4px; }
.app-header__actions { display: flex; align-items: center; gap: 12px; }
.dataset-summary { color: var(--text-secondary); font-size: 13px; }

main { padding: 24px 32px; max-width: 1240px; margin: 0 auto; }

/* ---------- Dropzone ---------- */
.dropzone {
  border: 2px dashed var(--border);
  border-radius: 16px;
  background: var(--surface-1);
  padding: 64px 24px;
  text-align: center;
  margin-top: 24px;
}
.dropzone.is-dragover { border-color: var(--series-1); background: var(--series-1-wash); }
.dropzone__title { font-size: 16px; margin-bottom: 16px; color: var(--text-secondary); }
.dropzone__hint { margin-top: 16px; color: var(--text-muted); font-size: 13px; max-width: 480px; margin-inline: auto; }
.dropzone__status { margin-top: 12px; color: var(--status-critical); font-size: 13px; min-height: 1em; }

/* ---------- Filter bar ---------- */
.filter-bar {
  display: flex;
  align-items: flex-end;
  gap: 24px;
  flex-wrap: wrap;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  margin-bottom: 20px;
}
.filter-group { display: flex; flex-direction: column; gap: 6px; }
.filter-group--grow { flex: 1 1 240px; }
.filter-label { font-size: 12px; color: var(--text-muted); }
.segmented { display: flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.segmented__btn {
  font: inherit;
  font-size: 13px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  padding: 6px 12px;
  cursor: pointer;
  border-inline-start: 1px solid var(--border);
}
.segmented__btn:first-child { border-inline-start: none; }
.segmented__btn.is-active { background: var(--series-1); color: #fff; }
.text-input {
  font: inherit;
  font-size: 13px;
  padding: 7px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface-1);
  color: var(--text-primary);
  min-width: 220px;
}
.flag-filters { display: flex; flex-wrap: wrap; gap: 10px; }
.flag-filter { display: flex; align-items: center; gap: 5px; font-size: 12px; color: var(--text-secondary); }

/* ---------- KPI strip ---------- */
.kpi-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}
.stat-tile {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
}
.stat-tile__label { font-size: 12px; color: var(--text-secondary); }
.stat-tile__value { font-size: 28px; font-weight: 600; margin-top: 6px; }
.stat-tile__value.is-warn { color: var(--status-critical); }

/* ---------- Cards ---------- */
.card-grid { display: grid; gap: 20px; margin-bottom: 20px; }
.card-grid--2 { grid-template-columns: repeat(auto-fit, minmax(360px, 1fr)); }
.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 20px;
  margin: 0;
}
.card--wide { margin-bottom: 20px; }
.card__title { font-size: 13px; font-weight: 600; color: var(--text-secondary); }
.card__title--section { font-size: 16px; color: var(--text-primary); display: flex; align-items: center; gap: 8px; }
.card__hint { font-size: 13px; color: var(--text-muted); margin-top: 6px; margin-bottom: 14px; }

.status-dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.status-dot--critical { background: var(--status-critical); }
.status-dot--warning { background: var(--status-warning); }

/* ---------- Charts ---------- */
.chart-slot { width: 100%; overflow-x: auto; }
.chart-slot svg { display: block; direction: ltr; }
.bar-mark { fill: var(--series-1); }
.bar-mark:hover, .bar-mark:focus { fill: color-mix(in srgb, var(--series-1) 80%, black 10%); }
.chart-axis-label { fill: var(--text-muted); font-size: 10px; font-family: system-ui, sans-serif; }
.chart-value-label { fill: var(--text-secondary); font-size: 11px; font-family: system-ui, sans-serif; }
.chart-gridline { stroke: var(--gridline); stroke-width: 1; }
.chart-baseline { stroke: var(--baseline); stroke-width: 1; }
.chart-empty { color: var(--text-muted); font-size: 13px; padding: 32px 0; text-align: center; }

.hbar-chart { display: flex; flex-direction: column; gap: 10px; }
.hbar-row {
  display: grid;
  grid-template-columns: 160px 1fr 44px;
  gap: 10px;
  align-items: center;
  font-size: 13px;
}
.hbar-row__label { color: var(--text-secondary); text-align: start; }
.hbar-row__track {
  direction: ltr;
  background: var(--gridline);
  height: 16px;
  border-radius: 4px;
  overflow: hidden;
}
.hbar-row__fill { height: 100%; background: var(--series-1); border-radius: 4px 0 0 4px; min-width: 2px; }
.hbar-row__fill--good { background: var(--status-good); }
.hbar-row__fill--critical { background: var(--status-critical); }
.hbar-row__value { text-align: end; font-variant-numeric: tabular-nums; color: var(--text-secondary); }

@media (max-width: 520px) {
  .hbar-row { grid-template-columns: 96px 1fr 36px; font-size: 12px; }
}

.table-toggle {
  margin-top: 10px;
  font-size: 12px;
  background: none;
  border: none;
  color: var(--series-1);
  cursor: pointer;
  padding: 0;
}
.table-slot { margin-top: 12px; }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; }
table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
table.data-table th, table.data-table td {
  text-align: start;
  padding: 9px 10px;
  border-bottom: 1px solid var(--gridline);
  font-variant-numeric: tabular-nums;
  vertical-align: top;
}
table.data-table th { color: var(--text-muted); font-weight: 500; font-size: 12px; }
table.data-table tbody tr:hover { background: var(--surface-2); }
.data-table__empty { color: var(--text-muted); text-align: center; padding: 24px 0 !important; }

.badge {
  display: inline-block;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  margin: 0 2px 2px 0;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  white-space: nowrap;
}
.badge--critical { color: var(--status-critical); border-color: color-mix(in srgb, var(--status-critical) 40%, transparent); }
.badge--warning { color: var(--status-warning); border-color: color-mix(in srgb, var(--status-warning) 50%, transparent); }
.badge--good { color: var(--status-good); border-color: color-mix(in srgb, var(--status-good) 40%, transparent); }

.link-btn {
  background: none;
  border: none;
  color: var(--series-1);
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  padding: 0;
  text-decoration: underline;
}

.snippet { color: var(--text-secondary); max-width: 360px; }

.empty-state { color: var(--text-muted); font-size: 13px; padding: 20px 0; text-align: center; }

/* ---------- Transcript panel ---------- */
.transcript-panel { position: fixed; inset: 0; z-index: 50; }
.transcript-panel__backdrop { position: absolute; inset: 0; background: rgba(0,0,0,0.4); }
.transcript-panel__sheet {
  position: absolute;
  top: 0;
  bottom: 0;
  inset-inline-end: 0;
  width: min(560px, 100%);
  background: var(--surface-1);
  box-shadow: -8px 0 24px rgba(0,0,0,0.2);
  display: flex;
  flex-direction: column;
}
.transcript-panel__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--border);
}
.transcript-panel__meta { color: var(--text-muted); font-size: 12px; margin-top: 4px; }
.transcript-panel__body { padding: 20px 22px; overflow-y: auto; flex: 1; display: flex; flex-direction: column; gap: 14px; }

.turn { max-width: 78%; padding: 10px 14px; border-radius: 14px; }
.turn__role { font-size: 11px; color: var(--text-muted); margin-bottom: 4px; }
.turn__content { white-space: pre-wrap; font-size: 14px; line-height: 1.5; }
.turn__time { font-size: 10px; color: var(--text-muted); margin-top: 4px; }
.turn.user { align-self: flex-start; background: var(--series-1-wash); }
.turn.assistant { align-self: flex-end; background: var(--surface-2); }

@media (max-width: 720px) {
  .app-header, main { padding-inline: 16px; }
  .filter-bar { flex-direction: column; align-items: stretch; }
}