/* ---------------------------------------------------------------------
   H446 Delivery Tracker — design tokens
   Light/dark palette per house data-viz system. Status colors are fixed
   and never reused for anything but delivery-stage / flag meaning.
--------------------------------------------------------------------- */

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

  --series-blue:    #2a78d6;
  --series-violet:  #4a3aa7;

  --status-good:      #0ca30c;
  --status-warning:   #fab219;
  --status-serious:   #ec835a;
  --status-critical:  #d03b3b;
  --status-neutral-fill: #e1e0d9;
  --status-neutral-text: #52514e;

  --teacher-emma: #4a3aa7; /* violet */
  --teacher-dave: #eb6834; /* orange */

  --success-text: #006300;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --font-sans: system-ui, -apple-system, "Segoe UI", sans-serif;
}

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

    --series-blue:    #3987e5;
    --series-violet:  #9085e9;

    --status-good:      #0ca30c;
    --status-warning:   #fab219;
    --status-serious:   #ec835a;
    --status-critical:  #e66767;
    --status-neutral-fill: #2c2c2a;
    --status-neutral-text: #c3c2b7;

    --teacher-emma: #9085e9;
    --teacher-dave: #d95926;

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

  --series-blue:    #3987e5;
  --series-violet:  #9085e9;

  --status-good:      #0ca30c;
  --status-warning:   #fab219;
  --status-serious:   #ec835a;
  --status-critical:  #e66767;
  --status-neutral-fill: #2c2c2a;
  --status-neutral-text: #c3c2b7;

  --teacher-emma: #9085e9;
  --teacher-dave: #d95926;

  --success-text: #0ca30c;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--surface-2);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.45;
}

body { max-width: 100%; overflow-x: hidden; }

h1, h2, h3 { font-family: var(--font-sans); margin: 0; }

button, select, input {
  font-family: var(--font-sans);
  font-size: 14px;
}

/* ---------- Header ---------- */

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 24px;
  background: var(--surface-1);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
}
.app-header__title h1 { font-size: 20px; font-weight: 700; }
.app-header__subtitle { margin: 2px 0 0; color: var(--text-secondary); font-size: 13px; }

/* ---------- Group-context strip ---------- */

/* Slim high-visibility bar below the header showing which teaching
   group is currently selected. Visible on every view so it is always
   obvious what a click affects. */
.group-context {
  background: color-mix(in srgb, var(--series-blue) 12%, var(--surface-1));
  border-bottom: 1px solid var(--border);
  padding: 8px 24px;
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 13px;
  color: var(--text-secondary);
  position: sticky;
  top: 64px;
  z-index: 15;
}
.group-context__label { text-transform: uppercase; letter-spacing: 0.06em; font-weight: 700; color: var(--text-muted); font-size: 11px; }
.group-context__name { color: var(--series-blue); font-size: 15px; font-weight: 700; }
@media (max-width: 640px) {
  .group-context { padding: 6px 12px; top: auto; position: static; }
}

/* ---------- Layout ---------- */

.app-main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 20px 20px 60px;
}

.app-footer {
  max-width: 1180px;
  margin: 0 auto;
  padding: 10px 20px 40px;
  color: var(--text-muted);
  font-size: 12.5px;
}

/* ---------- Buttons ---------- */

.btn {
  border: 1px solid var(--border);
  background: var(--surface-card);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  padding: 7px 12px;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.12s ease, border-color 0.12s ease;
}
.btn:hover { background: var(--gridline); }
.btn:focus-visible { outline: 2px solid var(--series-blue); outline-offset: 1px; }
.btn--ghost { background: transparent; }
.btn--sm { padding: 5px 10px; font-size: 12.5px; }
.btn--active { border-color: var(--series-blue); color: var(--series-blue); }
.btn--danger {
  border-color: color-mix(in srgb, var(--status-critical) 60%, transparent);
  color: var(--status-critical);
  background: transparent;
}
.btn--danger:hover {
  background: color-mix(in srgb, var(--status-critical) 12%, transparent);
}

/* Undo banner for destructive admin actions */
.undo-banner {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  margin: 0 0 12px;
  background: color-mix(in srgb, var(--status-warning) 18%, var(--surface-card));
  border: 1px solid color-mix(in srgb, var(--status-warning) 40%, var(--border));
  border-radius: var(--radius-md);
  font-size: 13px;
}
/* display:flex above would otherwise beat [hidden]'s UA display:none. */
.undo-banner[hidden] { display: none; }
.undo-banner__text { flex: 1; color: var(--text-primary); }
.undo-banner__dismiss {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  padding: 0 4px;
}
.undo-banner__dismiss:hover { color: var(--text-primary); }

/* ---------- Toolbar ---------- */

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  margin-bottom: 20px;
}
.toolbar__group { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.toolbar__group--right { margin-left: auto; }
.toolbar__label { font-size: 12.5px; color: var(--text-secondary); font-weight: 600; }
#group-select {
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface-1);
  color: var(--text-primary);
  font-weight: 600;
  max-width: 220px;
}

/* ---------- Dashboard ---------- */

.dashboard { display: flex; flex-direction: column; gap: 16px; margin-bottom: 22px; }

.stat-tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
}
.stat-tile {
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
}
.stat-tile__value {
  font-size: 28px;
  font-weight: 700;
  font-variant-numeric: proportional-nums;
  line-height: 1.1;
}
.stat-tile__label {
  margin-top: 4px;
  font-size: 12.5px;
  color: var(--text-secondary);
}
/* stat tile sub-value: "12 / 124" under the percentage */
.stat-tile__sub {
  font-size: 11.5px;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  margin-top: -2px;
  margin-bottom: 2px;
}
.stat-tile--flag .stat-tile__value { color: var(--status-critical); }
.stat-tile--teacher[data-teacher="Emma"] { border-left: 4px solid var(--teacher-emma); }
.stat-tile--teacher[data-teacher="Dave"] { border-left: 4px solid var(--teacher-dave); }
.stat-tile--flag:hover { background: color-mix(in srgb, var(--status-critical) 6%, var(--surface-card)); }

.save-indicator {
  color: var(--success-text);
  font-size: 12.5px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--success-text) 10%, transparent);
  transition: opacity 0.3s ease;
}
.save-indicator--pulse { animation: save-pulse 1.4s ease; }
@keyframes save-pulse {
  0%   { opacity: 0; transform: translateY(-3px); }
  15%  { opacity: 1; transform: translateY(0); }
  75%  { opacity: 1; }
  100% { opacity: 0; }
}

.panel {
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
}
.panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.panel__header h2 { font-size: 14.5px; font-weight: 700; }

/* Collapsible panel — used by "Progress by unit" so a long list of
   unit bars starts hidden and does not push the spec list down the
   fold on first load. */
.panel__header--toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  background: none;
  border: 0;
  padding: 0;
  margin: 0 0 10px;
  cursor: pointer;
  color: inherit;
  text-align: left;
  font: inherit;
}
.panel__header--toggle:focus-visible { outline: 2px solid var(--series-blue); outline-offset: 2px; border-radius: var(--radius-sm); }
.panel__caret {
  display: inline-block;
  color: var(--text-muted);
  transition: transform 0.15s ease;
  width: 1em;
}
.panel--collapsible.collapsed .panel__caret { transform: rotate(-90deg); }
.panel--collapsible.collapsed .panel__header--toggle { margin-bottom: 0; }
.panel--collapsible.collapsed .panel__body { display: none; }
.panel__actions {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 8px;
}

/* stacked progress bar */
.stack-bar {
  display: flex;
  width: 100%;
  height: 22px;
  border-radius: 6px;
  overflow: hidden;
  background: var(--gridline);
  border: 2px solid var(--surface-card);
}
.stack-bar__seg {
  height: 100%;
  transition: width 0.25s ease;
}
.stack-bar__seg + .stack-bar__seg { border-left: 2px solid var(--surface-card); }

.seg-notstarted  { background: var(--status-neutral-fill); }
.seg-inprogress  { background: var(--status-warning); }
.seg-taught      { background: var(--status-good); }
.seg-secure      { background: var(--series-blue); }

.legend { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 10px; font-size: 12.5px; color: var(--text-secondary); }
.legend__item { display: flex; align-items: center; gap: 6px; }
.legend__swatch { width: 11px; height: 11px; border-radius: 3px; flex: none; }

.unit-bar-row { display: grid; grid-template-columns: 230px 1fr 70px; align-items: center; gap: 10px; padding: 6px 0; }
.unit-bar-row__label { font-size: 12.5px; color: var(--text-secondary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.unit-bar-row__pct { font-size: 12.5px; color: var(--text-secondary); text-align: right; font-variant-numeric: tabular-nums; }

.table-wrap { margin-top: 12px; overflow-x: auto; }
table.data-table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
table.data-table th, table.data-table td {
  text-align: left;
  padding: 6px 10px;
  border-bottom: 1px solid var(--gridline);
  white-space: nowrap;
}
table.data-table th { color: var(--text-secondary); font-weight: 600; }
table.data-table td.num, table.data-table th.num { text-align: right; font-variant-numeric: tabular-nums; }

/* ---------- Filters ---------- */

.filters {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}
.filters__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}
.filters__advanced { }
.filters__summary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 5px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-card);
  list-style: none;
  user-select: none;
  width: fit-content;
}
.filters__summary::-webkit-details-marker { display: none; }
.filters__summary:hover { background: var(--gridline); }
.filters__summary-icon { color: var(--text-muted); transition: transform 0.15s ease; }
.filters__advanced[open] .filters__summary-icon { transform: rotate(90deg); }
.filters__badge {
  background: var(--series-blue);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 1px 7px;
  border-radius: 999px;
  min-width: 18px;
  text-align: center;
}
.filters__panel {
  margin-top: 8px;
  padding: 12px;
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.filters__group { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.filters__group-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  min-width: 72px;
}
#search {
  flex: 1 1 260px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface-card);
  color: var(--text-primary);
}
.chip-row { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  border: 1px solid var(--border);
  background: var(--surface-card);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}
.chip[aria-pressed="true"] {
  border-color: var(--series-blue);
  color: var(--text-primary);
  background: color-mix(in srgb, var(--series-blue) 12%, var(--surface-card));
}
.chip__dot { width: 8px; height: 8px; border-radius: 50%; flex: none; }
.flag-filter { display: flex; align-items: center; gap: 6px; font-size: 12.5px; color: var(--text-secondary); }
.sort-control { display: flex; align-items: center; gap: 6px; font-size: 12.5px; color: var(--text-secondary); }
.sort-control select {
  padding: 5px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface-card);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 12.5px;
}
.filters__count { margin-left: auto; font-size: 12.5px; color: var(--text-muted); }

.chip--teacher[aria-pressed="true"][data-teacher="Emma"] {
  border-color: var(--teacher-emma);
  background: color-mix(in srgb, var(--teacher-emma) 14%, var(--surface-card));
}
.chip--teacher[aria-pressed="true"][data-teacher="Dave"] {
  border-color: var(--teacher-dave);
  background: color-mix(in srgb, var(--teacher-dave) 14%, var(--surface-card));
}

.flat-group { margin-bottom: 20px; }
.flat-group__header {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  padding: 8px 4px;
  border-bottom: 1px solid var(--gridline);
  margin-bottom: 10px;
}
.flat-group__meta { color: var(--text-muted); font-weight: 500; font-variant-numeric: tabular-nums; }

/* ---------- Spec list ---------- */

.component-group { margin-bottom: 18px; }
.component-group__header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 4px;
  cursor: pointer;
  user-select: none;
}
.component-group__header h2 { font-size: 16px; }
.component-group__header .caret { transition: transform 0.15s ease; color: var(--text-muted); }
.component-group.collapsed .component-group__header .caret { transform: rotate(-90deg); }
.component-group.collapsed .component-group__body { display: none; }
.component-group__meta { margin-left: auto; font-size: 12.5px; color: var(--text-secondary); font-variant-numeric: tabular-nums; }

.unit-group { margin: 0 0 14px 4px; border-left: 3px solid var(--gridline); padding-left: 14px; }
.unit-group__header {
  display: flex;
  align-items: baseline;
  gap: 8px;
  cursor: pointer;
  padding: 6px 0;
  user-select: none;
}
.unit-group__header h3 { font-size: 14.5px; }
.unit-group__header .caret { transition: transform 0.15s ease; color: var(--text-muted); font-size: 12px; }
.unit-group.collapsed .unit-group__header .caret { transform: rotate(-90deg); }
.unit-group.collapsed .unit-group__body { display: none; }
.unit-group__meta { margin-left: auto; font-size: 12px; color: var(--text-muted); font-variant-numeric: tabular-nums; }

.subunit-group { margin: 4px 0 12px; }
.subunit-group__header {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin: 10px 0 6px;
  display: flex;
  gap: 8px;
  align-items: center;
  cursor: pointer;
  user-select: none;
}
.subunit-group__header .caret {
  transition: transform 0.15s ease;
  color: var(--text-muted);
  font-size: 11px;
}
.subunit-group.collapsed .subunit-group__header .caret { transform: rotate(-90deg); }
.subunit-group.collapsed .subunit-group__body { display: none; }
.subunit-group__meta { font-weight: 500; text-transform: none; color: var(--text-muted); font-variant-numeric: tabular-nums; }

/* Topic card meta row (teacher + term + week) */
.topic-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}
.meta-select {
  border: 1px solid var(--border);
  background: var(--surface-1);
  color: var(--text-secondary);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}
.meta-select[data-filled="true"] {
  color: var(--text-primary);
  border-color: var(--series-blue);
  background: color-mix(in srgb, var(--series-blue) 8%, var(--surface-1));
}
.meta-select--teacher[data-filled="true"][data-teacher="Emma"] {
  border-color: var(--teacher-emma);
  background: color-mix(in srgb, var(--teacher-emma) 14%, var(--surface-1));
  color: var(--text-primary);
}
.meta-select--teacher[data-filled="true"][data-teacher="Dave"] {
  border-color: var(--teacher-dave);
  background: color-mix(in srgb, var(--teacher-dave) 14%, var(--surface-1));
  color: var(--text-primary);
}
.meta-select:focus-visible { outline: 2px solid var(--series-blue); outline-offset: 1px; }

.topic-card {
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--gridline);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  margin-bottom: 8px;
}
.topic-card[data-stage="1"] { border-left-color: var(--status-warning); }
.topic-card[data-stage="2"] { border-left-color: var(--status-good); }
.topic-card[data-stage="3"] { border-left-color: var(--series-blue); }
.topic-card[data-flagged="true"] { box-shadow: inset 0 0 0 1px var(--status-critical); }
.topic-card[data-teacher="Emma"] { border-right: 4px solid var(--teacher-emma); }
.topic-card[data-teacher="Dave"] { border-right: 4px solid var(--teacher-dave); }

.topic-card__top { display: flex; gap: 10px; align-items: flex-start; }
.topic-card__code {
  flex: none;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--text-muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 2px 6px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.topic-card__text { flex: 1; font-size: 13.5px; color: var(--text-primary); }
.topic-card__cg-btn {
  flex: none;
  background: none;
  border: none;
  color: var(--series-blue);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  padding: 2px 4px;
  white-space: nowrap;
}
.topic-card__cg {
  margin-top: 8px;
  padding: 10px 12px;
  background: var(--surface-2);
  border-radius: var(--radius-sm);
  font-size: 12.5px;
  color: var(--text-secondary);
}
.topic-card__cg--none { font-style: italic; color: var(--text-muted); }

/* "Show all guidance" toggle wins over per-card [hidden]. */
body.show-all-guidance .topic-card__cg { display: block !important; }

.topic-card__controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
}

.stage-btn {
  border: 1px solid var(--border);
  background: var(--surface-1);
  color: var(--text-secondary);
  border-radius: 999px;
  padding: 5px 11px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
}
.stage-btn[aria-pressed="true"][data-stage="0"] { background: var(--status-neutral-fill); color: var(--status-neutral-text); border-color: transparent; }
.stage-btn[aria-pressed="true"][data-stage="1"] { background: var(--status-warning); color: #2b1c00; border-color: transparent; }
.stage-btn[aria-pressed="true"][data-stage="2"] { background: var(--status-good); color: #fff; border-color: transparent; }
.stage-btn[aria-pressed="true"][data-stage="3"] { background: var(--series-blue); color: #fff; border-color: transparent; }

.flag-btn {
  border: 1px solid var(--border);
  background: var(--surface-1);
  color: var(--text-secondary);
  border-radius: 999px;
  padding: 5px 11px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  margin-left: auto;
}
.flag-btn[aria-pressed="true"] { background: var(--status-critical); color: #fff; border-color: transparent; }

.notes-btn {
  border: 1px solid var(--border);
  background: var(--surface-1);
  color: var(--text-secondary);
  border-radius: 999px;
  padding: 5px 11px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}
.notes-btn[data-has-notes="true"] { border-color: var(--series-blue); color: var(--series-blue); }

.notes-box {
  width: 100%;
  margin-top: 8px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface-1);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 12.5px;
  min-height: 54px;
  resize: vertical;
}

.boot-loader {
  text-align: center;
  padding: 80px 20px;
  color: var(--text-muted);
  font-size: 14px;
}

.spec-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin: 8px 0 12px;
}
.spec-controls__toggle {
  margin-left: auto;
  font-size: 12.5px;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.empty-state {
  text-align: center;
  padding: 50px 20px;
  color: var(--text-muted);
}

/* ---------- Toast ---------- */

.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text-primary);
  color: var(--surface-1);
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  z-index: 50;
  box-shadow: 0 4px 18px rgba(0,0,0,0.25);
}

/* ---------- Print ---------- */

@media print {
  .app-header, .toolbar, .filters, .spec-controls, .app-footer, .topic-card__controls, #theme-toggle { display: none !important; }
  body { background: #fff; color: #000; }
  .component-group.collapsed .component-group__body,
  .unit-group.collapsed .unit-group__body { display: block !important; }
  .topic-card__cg { display: block !important; }
  .topic-card { break-inside: avoid; border: 1px solid #ccc; }
}

/* ---------- View switch ---------- */

.view-switch {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  margin-right: 8px;
}
.view-switch__btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 6px 14px;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
}
.view-switch__btn[aria-selected="true"] {
  background: var(--series-blue);
  color: #fff;
}

/* ---------- Admin view ---------- */

.admin-hint {
  color: var(--text-secondary);
  font-size: 12.5px;
  margin: 4px 0 12px;
}

.admin-table-wrap {
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 8px;
  overflow-x: auto;
}

.admin-table { min-width: 640px; }

.admin-row {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) 150px 150px 130px;
  align-items: center;
  gap: 8px;
  padding: 4px 6px;
  border-radius: var(--radius-sm);
}
.admin-row + .admin-row { border-top: 1px solid var(--gridline); }
.admin-row:hover { background: var(--surface-2); }

.admin-row__label {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.admin-row__label .caret {
  color: var(--text-muted);
  cursor: pointer;
  padding: 0 2px;
  transition: transform 0.15s ease;
  font-size: 12px;
  flex: none;
}
.admin-row__label.collapsed .caret { transform: rotate(-90deg); }
.admin-row__label--leaf .caret { visibility: hidden; }

.admin-row--component .admin-row__label { font-weight: 700; font-size: 14px; }
.admin-row--unit      .admin-row__label { font-weight: 600; font-size: 13.5px; padding-left: 16px; }
.admin-row--subunit   .admin-row__label { font-size: 12.5px; padding-left: 34px; text-transform: uppercase; letter-spacing: 0.02em; color: var(--text-secondary); }
.admin-row--topic     .admin-row__label { font-size: 12.5px; padding-left: 54px; color: var(--text-primary); }

.admin-row__code {
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  flex: none;
  margin-right: 6px;
}

.admin-select {
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-1);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  min-width: 0;
  width: 100%;
}
.admin-select[data-filled="true"] { color: var(--text-primary); border-color: var(--series-blue); }
.admin-select[data-mixed="true"] { color: var(--text-muted); font-style: italic; }
.admin-select[data-teacher="Emma"][data-filled="true"] {
  border-color: var(--teacher-emma);
  background: color-mix(in srgb, var(--teacher-emma) 14%, var(--surface-1));
}
.admin-select[data-teacher="Dave"][data-filled="true"] {
  border-color: var(--teacher-dave);
  background: color-mix(in srgb, var(--teacher-dave) 14%, var(--surface-1));
}
.admin-select[data-stage="1"][data-filled="true"] {
  border-color: var(--status-warning);
  background: color-mix(in srgb, var(--status-warning) 18%, var(--surface-1));
}
.admin-select[data-stage="2"][data-filled="true"] {
  border-color: var(--status-good);
  background: color-mix(in srgb, var(--status-good) 18%, var(--surface-1));
}
.admin-select[data-stage="3"][data-filled="true"] {
  border-color: var(--series-blue);
  background: color-mix(in srgb, var(--series-blue) 14%, var(--surface-1));
}

/* ---------- Login modal ---------- */

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}
.modal[hidden] { display: none; }
.modal__panel {
  background: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px 24px;
  max-width: 360px;
  width: 100%;
  box-shadow: 0 10px 40px rgba(0,0,0,0.35);
}
.modal__panel h2 { font-size: 18px; margin-bottom: 8px; }
.modal__hint { color: var(--text-secondary); font-size: 13px; margin: 0 0 14px; }
.modal__panel form { display: flex; flex-direction: column; gap: 10px; }
.modal__panel input[type="password"],
.modal__panel input[type="text"] {
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface-1);
  color: var(--text-primary);
  font-size: 15px;
}

.password-field { position: relative; display: flex; }
.password-field input { flex: 1; padding-right: 40px; width: 100%; }
.password-toggle {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px 8px;
  font-size: 16px;
  line-height: 1;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
}
.password-toggle:hover { background: var(--surface-2); }
.password-toggle:focus-visible { outline: 2px solid var(--series-blue); outline-offset: 1px; }
.modal__panel .btn {
  background: var(--series-blue);
  color: #fff;
  border-color: transparent;
  padding: 9px 14px;
}
.modal__panel .btn:hover { filter: brightness(1.08); background: var(--series-blue); }
.modal__error {
  margin: 10px 0 0;
  color: var(--status-critical);
  font-size: 12.5px;
  font-weight: 600;
}
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

@media (max-width: 640px) {
  .app-header { padding: 14px 16px; }
  .app-main { padding: 14px 12px 40px; }
  .unit-bar-row { grid-template-columns: 1fr; row-gap: 2px; }
  .unit-bar-row__pct { text-align: left; }
}