:root {
  --surface: #ffffff;
  --surface-2: #f1f5f9;
  --surface-3: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: #dbeafe;
  --accent-text: #ffffff;
  --danger: #dc2626;
  --danger-soft: #fee2e2;
  --warn: #d97706;
  --ok: #16a34a;
  --bar-bg: rgba(15, 23, 42, 0.5);
  --bar-bg-hover: rgba(255, 255, 255, 0.14);
  --bar-text: #f8fafc;
  --shadow: 0 18px 40px -12px rgba(0, 0, 0, 0.45), 0 4px 10px rgba(0, 0, 0, 0.12);
  --radius: 18px;
  --board-bg: #0b2a5b;
  --group-0: #2563eb;
  --group-1: #db2777;
  --group-2: #16a34a;
  --group-3: #d97706;
  --group-4: #7c3aed;
  --group-5: #0891b2;
  --group-6: #dc2626;
  --group-7: #65a30d;
  --group-8: #c026d3;
  --group-9: #0d9488;
  --group-10: #ea580c;
  --group-11: #4f46e5;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --surface: #1e293b;
    --surface-2: #0f172a;
    --surface-3: #334155;
    --text: #f1f5f9;
    --muted: #94a3b8;
    --border: #334155;
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --accent-soft: #1e3a8a;
    --danger: #f87171;
    --danger-soft: #450a0a;
    --warn: #fbbf24;
    --ok: #4ade80;
    color-scheme: dark;
  }
}
/* Widgets follow the background (light or dark image), like the top bar and dock,
   instead of the system theme. Same token values as above. */
body[data-tone='light'] .widget {
  --surface: #ffffff;
  --surface-2: #f1f5f9;
  --surface-3: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: #dbeafe;
  --danger: #dc2626;
  --danger-soft: #fee2e2;
  --warn: #d97706;
  --ok: #16a34a;
  --shadow: 0 18px 40px -16px rgba(15, 23, 42, 0.28), 0 2px 6px rgba(15, 23, 42, 0.08);
  color-scheme: light;
}
body[data-tone='dark'] .widget {
  --surface: #1e293b;
  --surface-2: #0f172a;
  --surface-3: #334155;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --border: #334155;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --accent-soft: #1e3a8a;
  --danger: #f87171;
  --danger-soft: #450a0a;
  --warn: #fbbf24;
  --ok: #4ade80;
  color-scheme: dark;
}

:root[data-theme='dark'] {
  --surface: #1e293b;
  --surface-2: #0f172a;
  --surface-3: #334155;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --border: #334155;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --accent-soft: #1e3a8a;
  --danger: #f87171;
  --danger-soft: #450a0a;
  --warn: #fbbf24;
  --ok: #4ade80;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
}

body {
  display: grid;
  grid-template-rows: auto 1fr;
  height: 100dvh;
  overflow: hidden;
  background: var(--board-bg);
  color: var(--text);
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', Arial, sans-serif;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
}

[hidden] {
  display: none !important;
}

.spacer {
  flex: 1;
}

.icon {
  display: inline-flex;
  width: 1.15em;
  height: 1.15em;
  flex: none;
}
.icon svg {
  width: 100%;
  height: 100%;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45em;
  padding: 0.55em 1em;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  font-weight: 600;
  white-space: nowrap;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
}
.btn:hover {
  background: var(--surface-2);
}
.btn:active {
  transform: scale(0.97);
}
.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
}
.btn.primary:hover {
  background: var(--accent-hover);
}
.btn.ghost {
  background: transparent;
  border-color: transparent;
}
.btn.ghost:hover {
  background: var(--surface-2);
}
.btn.danger {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}
.btn.danger-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--danger);
}
.btn.danger-ghost:hover {
  background: var(--danger-soft);
}
.btn.pressed {
  background: var(--accent-soft);
  border-color: var(--accent);
}
.btn.small {
  padding: 0.3em 0.7em;
  font-size: 0.85em;
}

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--muted);
}
.icon-btn:hover {
  background: var(--surface-2);
  color: var(--text);
}
.icon-btn.small {
  width: 28px;
  height: 28px;
  border-radius: 8px;
}

.chip {
  padding: 0.3em 0.8em;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-2);
  font-size: 0.85em;
  font-weight: 600;
}
.chip:hover {
  border-color: var(--accent);
}

/* ---------- Top bar & dock ---------- */

.topbar {
  position: relative;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  color: var(--bar-text);
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  letter-spacing: 0.01em;
  margin-right: 8px;
}

.class-picker {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  border-radius: 14px;
  background: var(--bar-bg);
  backdrop-filter: blur(12px);
}

.class-btn {
  max-width: 40vw;
  font-size: 1.05rem;
  font-weight: 700;
}
.class-btn-label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.class-btn-label.placeholder {
  opacity: 0.75;
  font-weight: 600;
}
.class-btn .icon:last-child {
  opacity: 0.7;
  transition: transform 0.15s;
}
.class-btn.open .icon:last-child {
  transform: rotate(180deg);
}

.class-menu {
  min-width: 240px;
  max-width: min(420px, calc(100vw - 32px));
  max-height: min(70vh, 520px);
  padding: 6px;
  overflow-y: auto;
}
.class-menu .popover-title {
  margin: 6px 10px 6px;
}
.menu-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 9px 10px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  text-align: left;
  font-weight: 600;
}
.menu-item:hover,
.menu-item:focus-visible {
  background: var(--surface-2);
  outline: none;
}
.menu-item .class-name {
  flex: 1;
}
.menu-item .menu-check {
  width: 1.15em;
  color: var(--accent);
}
.menu-item.active {
  color: var(--accent);
}
.menu-sep {
  height: 1px;
  margin: 6px 4px;
  background: var(--border);
}

.bar-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 36px;
  padding: 0 12px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--bar-text);
  font-weight: 600;
}
.bar-btn:hover {
  background: var(--bar-bg-hover);
}
.topbar > .bar-btn {
  background: var(--bar-bg);
  backdrop-filter: blur(12px);
}
.bar-btn.icon-only {
  width: 40px;
  height: 40px;
  padding: 0;
  justify-content: center;
}

.popover {
  inset: auto;
  top: 58px;
  right: 16px;
  margin: 0;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow);
}
.popover-title {
  margin: 0 0 10px;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.swatches {
  display: grid;
  grid-template-columns: repeat(3, 96px);
  gap: 8px;
}
.swatch {
  width: 96px;
  height: 54px;
  border: 2px solid var(--border);
  border-radius: 12px;
}
.swatch.active {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.dock {
  position: fixed;
  left: 50%;
  bottom: 14px;
  z-index: 1000;
  display: flex;
  gap: 4px;
  padding: 6px;
  transform: translateX(-50%);
  border-radius: 18px;
  background: var(--bar-bg);
  backdrop-filter: blur(12px);
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}
.dock-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  min-width: 84px;
  padding: 8px 14px;
  border: 0;
  border-radius: 12px;
  background: transparent;
  color: var(--bar-text);
  font-size: 0.8rem;
  font-weight: 600;
}
.dock-btn .icon {
  width: 26px;
  height: 26px;
}
.dock-btn:hover {
  background: var(--bar-bg-hover);
}
.dock-sep {
  width: 1px;
  margin: 8px 4px;
  background: var(--bar-text);
  opacity: 0.25;
}

/* ---------- Pen ---------- */

.ink {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 500; /* above widgets, below top bar and dock */
  pointer-events: none;
  touch-action: none;
}
body.pen-mode .ink {
  pointer-events: auto;
  cursor: crosshair;
}
body.pen-mode #dock {
  display: none;
}
.pen-bar {
  align-items: center;
}
.pen-colors {
  display: flex;
  gap: 8px;
  padding: 0 10px 0 6px;
}
.pen-swatch {
  width: 30px;
  height: 30px;
  padding: 0;
  border: 2px solid rgba(255, 255, 255, 0.7);
  border-radius: 50%;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.25);
}
.pen-swatch.on {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}
.pen-bar .dock-btn:disabled {
  opacity: 0.35;
  cursor: default;
}
.pen-bar .dock-btn:disabled:hover {
  background: transparent;
}
.pen-bar .dock-btn.on {
  background: var(--bar-bg-hover);
}
.pen-bar .dock-btn.danger {
  color: #fca5a5;
}
body[data-tone='light'] .pen-bar .dock-btn.danger {
  color: var(--danger);
}
.pen-bar .dock-btn.done {
  background: var(--accent);
  color: #fff;
}

/* ---------- Board ---------- */

.board {
  position: relative;
  margin: 0 12px 88px;
  overflow: hidden;
}

.board-empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  color: var(--bar-text);
  opacity: 0.85;
  pointer-events: none;
}
.board-empty h1 {
  margin: 0 0 8px;
  font-size: clamp(2rem, 5vw, 4rem);
  letter-spacing: -0.02em;
}
.board-empty p {
  margin: 0;
  font-size: 1.1rem;
}
body[data-tone='light'] .board-empty,
body[data-tone='light'] .topbar {
  --bar-text: #1f2937;
}
body[data-tone='light'] {
  --bar-bg: rgba(255, 255, 255, 0.6);
  --bar-bg-hover: rgba(15, 23, 42, 0.08);
}
body[data-tone='light'] .dock,
body[data-tone='light'] .pen-bar {
  --bar-text: #1f2937;
}

/* ---------- Widgets ---------- */

.widget {
  position: absolute;
  display: flex;
  flex-direction: column;
  min-width: 220px;
  min-height: 170px;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow);
}
.widget.dragging {
  box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.55);
}

.widget-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 5px 5px 14px;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: grab;
  touch-action: none;
  user-select: none;
}
.widget.dragging .widget-header {
  cursor: grabbing;
}
.widget-title {
  flex: 1;
}
.widget-header .icon-btn {
  opacity: 0;
  transition: opacity 0.15s;
}
.widget:hover .widget-header .icon-btn,
.widget-header .icon-btn:focus-visible {
  opacity: 1;
}

.widget-body {
  position: relative;
  flex: 1;
  min-height: 0;
  container-type: size;
}

.resize-handle {
  position: absolute;
  right: 2px;
  bottom: 2px;
  width: 20px;
  height: 20px;
  cursor: nwse-resize;
  touch-action: none;
  background: linear-gradient(135deg, transparent 58%, var(--muted) 58%, var(--muted) 62%, transparent 62%, transparent 74%, var(--muted) 74%, var(--muted) 78%, transparent 78%);
  opacity: 0;
  transition: opacity 0.15s;
}
.widget:hover .resize-handle {
  opacity: 1;
}

/* Touch screens have no hover: keep close and resize visible, with finger-sized targets.
   any-pointer also catches interactive boards that have a mouse attached. */
@media (any-pointer: coarse) {
  .widget-header .icon-btn {
    opacity: 1;
    width: 40px;
    height: 40px;
  }
  /* Room for the resize corner so it does not cover buttons in the widget. */
  .widget-body {
    margin-bottom: 14px;
  }
  .resize-handle {
    right: 0;
    bottom: 0;
    width: 34px;
    height: 34px;
    opacity: 1;
    background: linear-gradient(135deg, transparent 60%, var(--muted) 60%, var(--muted) 63%, transparent 63%, transparent 73%, var(--muted) 73%, var(--muted) 76%, transparent 76%);
  }
}

.segmented {
  display: inline-flex;
  padding: 3px;
  border-radius: 10px;
  background: var(--surface-2);
}
.segmented button {
  padding: 4px 12px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
}
.segmented button.on {
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.toggle input {
  accent-color: var(--accent);
  width: 16px;
  height: 16px;
}

/* ---------- Pop-out window ---------- */

.pop-btn .icon-popin,
.widget.popped .pop-btn .icon-popout {
  display: none;
}
.widget.popped .pop-btn .icon-popin {
  display: inline-flex;
}
body.pip {
  display: block;
  height: 100vh;
  background: var(--surface);
}
.widget.popped {
  position: static;
  width: 100vw !important; /* beats the board position set inline */
  height: 100vh !important;
  min-width: 0;
  min-height: 0;
  border-radius: 0;
  box-shadow: none;
}
.widget.popped .widget-header {
  cursor: default;
}
.widget.popped .widget-header .icon-btn {
  opacity: 1;
}
.widget.popped .resize-handle {
  display: none;
}

/* ---------- Timer ---------- */

.timer {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(6px, 3cqh, 18px);
  height: 100%;
  padding: 4px 16px 16px;
}

.timer-display {
  width: 100%;
  padding: 0;
  border: 0;
  background: none;
  font-size: min(25cqw, 34cqh);
  font-weight: 750;
  line-height: 1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  text-align: center;
  transition: color 0.3s;
}
.timer:not(.running) button.timer-display:hover {
  color: var(--accent);
}
.timer-input {
  border-radius: 12px;
  background: var(--surface-2);
  outline: 3px solid var(--accent);
}
.timer[data-level='low'] .timer-display {
  color: var(--warn);
}
.timer[data-level='end'] .timer-display,
.timer.done .timer-display {
  color: var(--danger);
}
.timer.done .timer-display {
  animation: blink 1s steps(2, jump-none) infinite;
}
@keyframes blink {
  50% {
    opacity: 0.25;
  }
}

.timer-progress {
  width: 86%;
  height: clamp(5px, 2cqh, 12px);
  overflow: hidden;
  border-radius: 99px;
  background: var(--surface-2);
}
.timer-bar {
  height: 100%;
  border-radius: inherit;
  background: var(--accent);
  transition: width 0.2s linear, background 0.3s;
}
.timer[data-level='low'] .timer-bar {
  background: var(--warn);
}
.timer[data-level='end'] .timer-bar {
  background: var(--danger);
}

.timer-presets {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
}
.timer-controls {
  display: flex;
  gap: 8px;
}
.btn.big {
  font-size: clamp(0.9rem, 4cqh, 1.25rem);
}

@container (max-height: 230px) {
  .timer-presets {
    display: none;
  }
}
@container (max-height: 210px) {
  .timer-modes {
    display: none;
  }
}

/* ---------- Random picker ---------- */

.picker {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 0 14px 14px;
}

.picker-stage {
  flex: 1;
  display: grid;
  place-items: center;
  min-height: 0;
  margin-bottom: 10px;
  padding: 0 8px;
  border: 0;
  border-radius: 14px;
  background: var(--surface-2);
  overflow: hidden;
}

.picker-name {
  max-width: 100%;
  font-size: min(30cqh, calc(165cqw / var(--len, 8)));
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  text-align: center;
  white-space: nowrap;
}
.picker-name.placeholder {
  font-size: min(12cqh, calc(120cqw / var(--len, 8)));
  font-weight: 600;
  color: var(--muted);
}
.picker-name.rolling {
  opacity: 0.55;
}
.picker-name.reveal {
  color: var(--accent);
  animation: pop 0.45s cubic-bezier(0.2, 1.6, 0.4, 1);
}
@keyframes pop {
  from {
    transform: scale(0.7);
    opacity: 0.3;
  }
}

.picker-footer {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.picker-info {
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* ---------- Group maker ---------- */

.groups {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 0 14px 14px;
}
.groups-stage {
  flex: 1;
  min-height: 0;
  margin-bottom: 10px;
  overflow: auto;
  container-type: size;
}
.groups-empty {
  display: grid;
  place-items: center;
  height: 100%;
  margin: 0;
  border-radius: 14px;
  background: var(--surface-2);
  color: var(--muted);
  font-size: clamp(1rem, 7cqh, 2rem);
  font-weight: 600;
  text-align: center;
}
.group-grid {
  display: grid;
  grid-template-columns: repeat(var(--cols), minmax(0, 1fr));
  grid-auto-rows: 1fr;
  gap: 8px;
  min-height: 100%;
}
.group-card {
  min-width: 0;
  padding: 0.5em 0.7em 0.6em;
  border-top: 5px solid var(--hue);
  border-radius: 12px;
  background: var(--surface-2);
}
.group-card h4 {
  margin: 0 0 0.3em;
  color: var(--hue);
  font-size: 0.8em;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.group-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
.group-card li {
  font-weight: 600;
  line-height: 1.25;
  overflow-wrap: anywhere;
}
.group-grid.animate .group-card {
  animation: deal 0.35s cubic-bezier(0.2, 1.2, 0.4, 1) backwards;
  animation-delay: calc(var(--i) * 60ms);
}
@keyframes deal {
  from {
    transform: translateY(12px) scale(0.94);
    opacity: 0;
  }
}

.groups-controls {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.stepper {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 2px;
  border-radius: 10px;
  background: var(--surface-2);
}
.stepper-value {
  min-width: 2ch;
  font-size: 1.1rem;
  font-weight: 700;
  text-align: center;
  font-variant-numeric: tabular-nums;
}
.groups-hint {
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
}

/* ---------- Traffic light ---------- */

.traffic {
  display: grid;
  place-items: center;
  height: 100%;
  padding: 0 14px 14px;
}
.traffic-housing {
  display: flex;
  flex-direction: column;
  gap: 4cqmin;
  padding: 4cqmin;
  border-radius: 999px;
  background: var(--surface-2);
}
.light {
  --size: min(25cqh, 72cqw);
  width: var(--size);
  height: var(--size);
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: color-mix(in srgb, var(--c) 16%, transparent);
  transition: background 0.2s, box-shadow 0.2s;
}
.light.on {
  background: var(--c);
  box-shadow: 0 0 calc(var(--size) * 0.35) color-mix(in srgb, var(--c) 60%, transparent);
}
.light-red {
  --c: var(--danger);
}
.light-yellow {
  --c: var(--warn);
}
.light-green {
  --c: var(--ok);
}
/* Wide widget: lay the lights out horizontally. */
@container (min-aspect-ratio: 13 / 10) {
  .traffic-housing {
    flex-direction: row;
  }
  .light {
    --size: min(25cqw, 72cqh);
  }
}

@media (prefers-reduced-motion: reduce) {
  .group-grid.animate .group-card,
  .picker-name.reveal,
  .timer.done .timer-display {
    animation: none;
  }
}

/* ---------- Class manager ---------- */

.manager {
  width: min(760px, calc(100vw - 32px));
  height: min(720px, calc(100dvh - 32px));
  padding: 0;
  border: 0;
  border-radius: 20px;
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow);
}
.manager[open] {
  display: grid;
  grid-template-rows: auto 1fr auto;
}
.manager::backdrop {
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(4px);
}

.manager-header,
.manager-footer {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}
.manager-footer {
  border-top: 1px solid var(--border);
  border-bottom: 0;
  justify-content: flex-end;
  padding: 10px 18px;
}
.manager-header h2 {
  margin: 0;
  font-size: 1.25rem;
}
.privacy-note {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-right: auto;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
}


.class-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.count {
  color: var(--muted);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
}
.badge {
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 700;
  white-space: nowrap;
}

.manager-subtitle {
  min-width: 0;
  overflow: hidden;
  color: var(--muted);
  font-size: 1.05rem;
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.class-rows {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.class-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 8px 8px 6px;
  border: 1px solid var(--border);
  border-radius: 12px;
}
.class-row.active {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent-soft) 35%, transparent);
}
.class-row-name {
  flex: 1;
  min-width: 140px;
  padding: 6px 8px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  font-size: 1.05rem;
  font-weight: 700;
  text-overflow: ellipsis;
}
.class-row-name:hover,
.class-row-name:focus {
  border-color: var(--border);
  background: var(--surface);
  outline: none;
}
.class-row .badge {
  padding: 6px 12px;
  font-size: 0.8rem;
}

.inline-form {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
}

.manager-detail {
  min-height: 0;
  padding: 18px 22px;
  overflow-y: auto;
}


.toolbar,
.row-end {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}
.row-end {
  justify-content: flex-end;
  margin: 10px 0 0;
}

.inline-form input {
  min-width: 0;
}
.inline-form input,
.paste-box textarea,
.import input:not([type]),
.import select {
  flex: 1;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
}
.inline-form input:focus,
.paste-box textarea:focus,
.import input:focus,
.import select:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}
.paste-box {
  margin-bottom: 14px;
}
.paste-box textarea {
  width: 100%;
  resize: vertical;
}

.list-meta {
  margin: 14px 0 6px;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
}

.student-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 4px 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.student-list li {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 3px 4px 3px 0;
  border-bottom: 1px solid var(--border);
}
.student-name {
  flex: 1;
  min-width: 0;
  padding: 6px 8px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
}
.student-name:hover,
.student-name:focus {
  border-color: var(--border);
  outline: none;
}

.empty-state {
  display: grid;
  place-items: center;
  align-content: center;
  gap: 4px;
  height: 100%;
  text-align: center;
  color: var(--muted);
}
.empty-state h3 {
  margin: 0;
  color: var(--text);
  font-size: 1.3rem;
}
.empty-state p {
  max-width: 380px;
  margin: 0 0 12px;
}
.empty-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.error {
  margin: 0 0 14px;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--danger-soft);
  color: var(--danger);
  font-weight: 600;
}

.import-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px 16px;
}
.import-grid > label:not(.check) {
  display: grid;
  gap: 4px;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
}
.import-grid > .wide {
  grid-column: 1 / -1;
}
.name-format {
  display: grid;
  gap: 4px;
  justify-items: start;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
}
.list-meta .warn {
  color: var(--warn);
}
.import-grid input,
.import-grid select {
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 400;
}
.import fieldset {
  grid-column: 1 / -1;
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 10px 14px 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
}
.import legend {
  padding: 0 4px;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
}
.check {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}
.check input[type='checkbox'],
.check input[type='radio'] {
  accent-color: var(--accent);
  width: 17px;
  height: 17px;
  flex: none;
}
.import-preview {
  columns: 3 180px;
  margin: 0;
  padding: 12px 12px 12px 36px;
  border-radius: 12px;
  background: var(--surface-2);
}
.import-preview li {
  padding: 2px 0;
  break-inside: avoid;
}
.import-preview .more {
  list-style: none;
  color: var(--muted);
}

/* ---------- Small screens ---------- */

@media (max-width: 720px) {
  .brand {
    display: none;
  }
  .topbar {
    padding: 8px 12px;
  }
  .class-btn {
    max-width: 52vw;
  }
  .board {
    margin: 0 8px 84px;
  }
  .class-row {
    flex-wrap: wrap;
  }
  .class-row-name {
    flex-basis: 100%;
  }
  .class-row > :last-child {
    margin-left: auto;
  }
  .privacy-note {
    display: none;
  }
  .manager-header .icon-btn:last-child {
    margin-left: auto;
  }
}