:root {
  --bg: #eef3f8;
  --surface: #ffffff;
  --text: #172033;
  --muted: #5f6f86;
  --line: #d9e2ec;
  --blue: #1f6feb;
  --green: #11865b;
  --red: #d33a2c;
  --amber: #b7791f;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
}

.shell {
  min-height: 100vh;
  width: min(1680px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0;
}

.hero, .panel, .stat, .task-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.hero {
  padding: clamp(28px, 6vw, 72px);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--blue);
  font-weight: 750;
  text-transform: uppercase;
  font-size: 0.85rem;
}

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

h1 {
  font-size: clamp(2rem, 7vw, 4.8rem);
  line-height: 1;
  margin-bottom: 18px;
}

h2 {
  font-size: 1.35rem;
}

p {
  color: var(--muted);
  line-height: 1.6;
}

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

.actions, .toolbar, .form-grid, .map-tools {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.toolbar {
  align-items: center;
  justify-content: flex-end;
}

.auth-status {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0 12px;
  background: var(--surface);
  color: var(--muted);
  font-weight: 650;
}

.auth-status.signed-in {
  border-color: rgba(17, 134, 91, 0.35);
  background: #eefaf5;
  color: var(--green);
}

.selected-org-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #f8fafc;
}

.selected-org-card strong {
  display: block;
}

.selected-org-card p {
  margin: 4px 0 0;
}

.button, button {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--blue);
  border-radius: 6px;
  padding: 0 14px;
  background: var(--blue);
  color: white;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.button.secondary, button.secondary {
  background: var(--green);
  border-color: var(--green);
}

.button.ghost, button.ghost {
  background: transparent;
  color: var(--blue);
}

button.danger {
  background: var(--red);
  border-color: var(--red);
}

input, textarea, select {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 12px;
  font: inherit;
  background: white;
  color: var(--text);
}

textarea {
  min-height: 86px;
  resize: vertical;
}

.builder-section {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: #f8fafc;
}

.collapsed-builder-section summary {
  cursor: pointer;
  font-weight: 800;
}

.collapsed-builder-section[open] summary {
  margin-bottom: 12px;
}

.compact-heading h3 {
  margin-bottom: 0;
}

.builder-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.builder-heading h3 {
  margin: 0;
}

.builder-list {
  display: grid;
  gap: 10px;
}

.builder-row {
  display: grid;
  grid-template-columns: auto minmax(150px, 1fr) auto;
  gap: 10px;
  align-items: end;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.builder-row.media {
  grid-template-columns: 150px minmax(130px, 1fr) minmax(180px, 2fr) auto;
}

.builder-row.hint {
  grid-template-columns: minmax(180px, 1fr) auto;
}

.builder-row.number-band {
  grid-template-columns: minmax(110px, 1fr) minmax(110px, 1fr) auto;
}

.check-label {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-weight: 700;
}

.check-label input {
  min-height: auto;
}

.file-note {
  grid-column: 1 / -1;
  color: var(--muted);
  font-size: 0.9rem;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.92rem;
}

label span {
  color: var(--text);
  font-weight: 700;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.grid {
  display: grid;
  grid-template-columns: var(--org-width, 300px) minmax(0, 1fr) var(--chat-width, 340px);
  gap: 14px;
  align-items: start;
  position: relative;
}

.org-sidebar {
  grid-column: 1;
  grid-row: 1;
}

.main-admin-panel {
  grid-column: 2;
  grid-row: 1;
}

.chat-sidebar {
  grid-column: 3;
  grid-row: 1;
}

.resize-handle {
  grid-row: 1;
  align-self: stretch;
  min-height: 420px;
  cursor: col-resize;
  background: #e7eef7;
  transition: background 0.15s ease;
  width: 8px;
  z-index: 3;
  border-radius: 999px;
}

.left-resize-handle {
  grid-column: 1;
  justify-self: end;
  transform: translateX(11px);
}

[data-resize-pane="chat"] {
  grid-column: 3;
  justify-self: start;
  transform: translateX(-11px);
}

.resize-handle:hover,
.resize-handle.is-dragging {
  background: var(--blue);
}

.sidebar-compact-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.org-sidebar.is-collapsed {
  padding: 10px 8px;
  justify-items: center;
}

.org-sidebar.is-collapsed > :not(.sidebar-compact-header) {
  display: none;
}

.org-sidebar.is-collapsed .sidebar-compact-header {
  display: grid;
  justify-items: center;
}

.org-sidebar.is-collapsed h2 {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-size: 1rem;
  margin: 0;
}

.org-sidebar.is-collapsed #toggle-org-sidebar-button {
  writing-mode: vertical-rl;
  padding: 8px 6px;
}

.panel {
  padding: 18px;
}

.stack {
  display: grid;
  gap: 12px;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}

.stat {
  padding: 16px;
}

.stat strong {
  display: block;
  font-size: 1.8rem;
}

.list {
  display: grid;
  gap: 10px;
}

.task-card {
  padding: 14px;
}

.tab-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--line);
  padding-bottom: 8px;
}

.tab-button {
  background: transparent;
  color: var(--muted);
  border-color: var(--line);
}

.tab-button.active {
  background: var(--blue);
  border-color: var(--blue);
  color: white;
}

.admin-tab {
  min-width: 0;
}

.task-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

button.compact {
  min-height: 32px;
  padding: 0 10px;
  font-size: 0.9rem;
}

.task-group {
  display: grid;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #f8fafc;
}

.task-group h3 {
  margin: 0;
}

.student-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.student-topline p {
  margin: 0;
}

.student-score-panel {
  display: grid;
  gap: 6px;
}

.student-score-grid {
  margin-bottom: 0;
}

.student-tab {
  display: grid;
  gap: 12px;
}

.activity-log {
  display: grid;
  gap: 8px;
}

.log-entry {
  border: 1px solid var(--line);
  border-left: 4px solid var(--blue);
  border-radius: 8px;
  padding: 10px 12px;
  background: #fff;
}

.log-entry p {
  margin: 4px 0;
}

.log-entry small {
  color: var(--muted);
}

.choice-list {
  display: grid;
  gap: 8px;
  margin: 12px 0;
  padding: 0;
  border: 0;
}

.choice-list legend {
  margin-bottom: 6px;
  color: var(--text);
  font-weight: 700;
}

.choice-option {
  display: flex;
  grid-template-columns: none;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fafc;
  color: var(--text);
}

.choice-option input {
  min-height: auto;
  width: 18px;
  height: 18px;
}

.asset-list {
  display: grid;
  gap: 8px;
  margin: 12px 0;
}

.asset-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fafc;
  text-decoration: none;
  font-weight: 700;
}

.asset-link span {
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 650;
}

.hint-box {
  margin: 12px 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff8eb;
}

.hint-box summary {
  cursor: pointer;
  font-weight: 700;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  border-radius: 999px;
  padding: 0 10px;
  font-weight: 750;
  font-size: 0.86rem;
  white-space: nowrap;
}

.status-pill.success {
  background: #eefaf5;
  color: var(--green);
}

.status-pill.retry {
  background: #fff1f0;
  color: var(--red);
}

.status-pill.submitted {
  background: #edf4ff;
  color: var(--blue);
}

.status-pill.pending {
  background: #fff8eb;
  color: var(--amber);
}

.submitted-box {
  margin-top: 12px;
  border-left: 4px solid var(--blue);
  border-radius: 6px;
  padding: 10px 12px;
  background: #edf4ff;
}

.submitted-box p {
  margin-bottom: 0;
}

.group-card {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) minmax(260px, 1.4fr);
  gap: 12px;
  align-items: center;
}

.group-card p {
  margin-bottom: 0;
}

.group-card.missing-code {
  border-color: rgba(183, 121, 31, 0.45);
  background: #fffaf0;
}

.group-login-details {
  display: grid;
  gap: 8px;
  margin: 10px 0 0;
}

.group-login-details div {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
}

.group-login-details dt {
  color: var(--muted);
}

.group-login-details dd {
  margin: 0;
  color: var(--text);
}

.group-login-details code {
  font-size: 1.08rem;
  font-weight: 800;
}

.group-password-tools {
  display: grid;
  grid-template-columns: minmax(120px, 1fr) auto auto auto auto auto;
  gap: 8px;
}

.compact-group-card {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
}

.group-summary h3 {
  margin-bottom: 6px;
}

.group-card-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.group-detail-panel {
  grid-column: 1 / -1;
  display: grid;
  gap: 16px;
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.group-detail-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(220px, 0.8fr);
  gap: 14px;
}

.group-info-box,
.group-edit-box,
.score-adjust-box {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: #fbfdff;
}

.mini-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 8px;
  margin-bottom: 12px;
}

.mini-stats div {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  background: #fff;
}

.mini-stats span {
  display: block;
  color: var(--muted);
  font-size: 0.88rem;
}

.mini-stats strong {
  font-size: 1.35rem;
}

.mini-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94rem;
}

.mini-table th,
.mini-table td {
  border-bottom: 1px solid var(--line);
  padding: 8px;
  text-align: left;
  vertical-align: top;
}

.manual-score-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.manual-score-inline input {
  width: 76px;
  min-height: 36px;
  padding: 6px 8px;
}

.tiny-button {
  min-height: 36px;
  padding: 6px 10px;
}

.submission-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, auto);
  gap: 14px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: #fff;
}

.submission-card p {
  margin-bottom: 6px;
}

.submission-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 8px;
}

.submission-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: end;
  justify-content: flex-end;
}

.submission-actions label {
  min-width: 96px;
  margin: 0;
}

.submission-actions input {
  min-height: 42px;
  padding: 8px 10px;
}

.preview-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 24px;
}

.preview-modal[hidden] {
  display: none;
}

.preview-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(9, 17, 31, 0.68);
}

.preview-modal-panel {
  position: relative;
  z-index: 1;
  width: min(980px, 100%);
  max-height: min(86vh, 900px);
  overflow: auto;
  border-radius: 8px;
  padding: 18px;
  background: var(--surface);
  box-shadow: 0 18px 70px rgba(0, 0, 0, 0.35);
}

.submission-preview-body {
  display: grid;
  place-items: center;
  min-height: 220px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #f8fbff;
}

.submission-preview-media {
  display: block;
  max-width: 100%;
  max-height: 68vh;
  border-radius: 6px;
}

.submission-preview-audio {
  width: min(620px, 100%);
}

.button-like {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border-radius: 6px;
  padding: 10px 16px;
  background: var(--blue);
  color: #fff;
  font-weight: 800;
  text-decoration: none;
}

body.modal-open {
  overflow: hidden;
}

.adjustment-line {
  display: grid;
  gap: 3px;
  border-left: 4px solid var(--line);
  padding: 8px 10px;
  margin-bottom: 8px;
  background: #fff;
}

.reward-line {
  border-left-color: var(--green);
}

.penalty-line {
  border-left-color: var(--red);
}

.group-route-box,
.group-message-box,
.message-panel {
  grid-column: 1 / -1;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.route-task-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 8px;
  margin: 8px 0;
}

.route-check {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  background: #f8fafc;
}

.message-thread {
  display: grid;
  gap: 8px;
  margin: 8px 0 10px;
}

.message-bubble {
  max-width: min(680px, 100%);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: #f8fafc;
}

.message-bubble p {
  margin: 4px 0;
}

.message-bubble small {
  color: var(--muted);
}

.message-admin {
  background: #eef5ff;
  border-color: #b7d3ff;
}

.message-student {
  background: #f5fbf1;
  border-color: #bfe1b1;
}

.message-composer {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) auto;
  gap: 8px;
}

.chat-admin-layout {
  display: grid;
  grid-template-columns: minmax(180px, 280px) minmax(0, 1fr);
  gap: 14px;
}

.chat-roster {
  display: grid;
  align-content: start;
  gap: 8px;
}

.chat-roster-item {
  display: grid;
  gap: 2px;
  text-align: left;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
}

.chat-roster-item.active {
  border-color: var(--blue);
  background: #eef5ff;
}

.chat-roster-item span {
  color: var(--muted);
  font-size: 0.9rem;
}

.chat-thread-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: #fbfdff;
}

.chat-thread {
  max-height: 520px;
  overflow: auto;
  padding-right: 4px;
}

.chat-sidebar {
  position: sticky;
  top: 16px;
  max-height: calc(100vh - 32px);
  overflow: auto;
}

.chat-sidebar-log {
  display: grid;
  gap: 8px;
  margin: 10px 0 14px;
}

.sidebar-message {
  display: grid;
  gap: 3px;
  width: 100%;
  border: 1px solid var(--line);
  border-left: 4px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  padding: 10px;
  text-align: left;
}

.sidebar-message.latest {
  border-color: #b7d3ff;
  border-left-color: var(--blue);
  background: #eef5ff;
}

.sidebar-message span {
  color: var(--muted);
  font-size: 0.82rem;
}

.sidebar-message p {
  margin: 0;
  color: var(--muted);
}

.chat-sidebar-reply {
  display: grid;
  gap: 8px;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.skip-task-box {
  margin-top: 16px;
  border: 1px solid #f1b5ad;
  border-radius: 8px;
  padding: 12px;
  background: #fffafa;
}

.skip-task-box summary {
  cursor: pointer;
  color: var(--red);
  font-weight: 800;
}

.notification-stack {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 10000;
  display: grid;
  gap: 10px;
  width: min(360px, calc(100vw - 32px));
}

.app-notification {
  border: 1px solid #b7d3ff;
  border-left: 5px solid var(--blue);
  border-radius: 8px;
  box-shadow: 0 12px 32px rgba(23, 32, 51, 0.18);
  background: #ffffff;
  padding: 12px 14px;
}

.score-popup strong {
  font-size: 1.2rem;
}

.reward-popup {
  border-color: #a7d7bf;
  border-left-color: var(--green);
  background: #f0fff7;
}

.penalty-popup {
  border-color: #f1b5ad;
  border-left-color: var(--red);
  background: #fff5f4;
}

.app-notification p {
  margin: 4px 0 0;
}

.badge-alert {
  display: inline-block;
  margin-left: 8px;
  border-radius: 999px;
  background: #de3b31;
  color: #fff;
  padding: 2px 8px;
  font-size: 0.78rem;
}

.compact-notice {
  margin-top: 10px;
  font-size: 0.92rem;
}

.compact-settings {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #fbfdff;
}

.compact-settings h3 {
  margin-bottom: 10px;
}

.muted {
  color: var(--muted);
}

.map-picker {
  min-height: 260px;
  border: 1px dashed var(--line);
  border-radius: 8px;
  background: #f8fafc;
  color: var(--muted);
  text-align: center;
  padding: 24px;
  overflow: hidden;
}

.map-picker.is-live {
  min-height: 360px;
  padding: 0;
  border-style: solid;
}

.live-map {
  min-height: 360px;
}

.map-tools input {
  min-width: min(420px, 100%);
  flex: 1;
}

#google-login-slot:not(:empty) {
  min-width: 220px;
}

.live-table {
  width: 100%;
  border-collapse: collapse;
}

.live-table th, .live-table td {
  border-bottom: 1px solid var(--line);
  padding: 10px;
  text-align: left;
  vertical-align: top;
}

.notice {
  border-left: 4px solid var(--amber);
  background: #fff8eb;
  padding: 12px;
  border-radius: 6px;
}

.success-notice {
  border-left-color: var(--green);
  background: #eefaf5;
}

@media (max-width: 820px) {
  .app-header {
    display: block;
  }

  .grid, .stats {
    grid-template-columns: 1fr;
  }

  .resize-handle {
    display: none;
  }

  .org-sidebar.is-collapsed {
    padding: 18px;
    justify-items: stretch;
  }

  .org-sidebar.is-collapsed > :not(.sidebar-compact-header) {
    display: grid;
  }

  .org-sidebar.is-collapsed h2,
  .org-sidebar.is-collapsed #toggle-org-sidebar-button {
    writing-mode: horizontal-tb;
    transform: none;
  }

  .chat-sidebar {
    position: static;
    max-height: none;
  }

  .group-card,
  .group-password-tools,
  .message-composer,
  .chat-admin-layout,
  .compact-group-card,
  .group-detail-grid {
    grid-template-columns: 1fr;
  }

  .group-card-actions {
    justify-content: stretch;
  }
}