:root {
  color-scheme: light;
  --bg: #f4f6fb;
  --bg-top: #edf2fb;
  --surface: #ffffff;
  --surface-soft: #eef3fb;
  --surface-plain: #ffffff;
  --line: #d8e0f0;
  --text: #172033;
  --muted: #5d6983;
  --brand: #2144a6;
  --brand-soft: #dce5fb;
  --success: #1d7a52;
  --warning: #b26a00;
  --danger: #b42318;
  --shadow: 0 18px 40px rgba(19, 35, 74, 0.08);
  --radius: 18px;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0f1728;
  --bg-top: #131d33;
  --surface: #14203a;
  --surface-soft: #1a2948;
  --surface-plain: #0f1a31;
  --line: #2d3d61;
  --text: #e7eefc;
  --muted: #a6b3d1;
  --brand: #8eb0ff;
  --brand-soft: rgba(142, 176, 255, 0.16);
  --success: #6ee7b7;
  --warning: #f7b955;
  --danger: #ff8b8b;
  --shadow: 0 24px 48px rgba(1, 6, 19, 0.42);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: linear-gradient(180deg, var(--bg-top) 0%, var(--bg) 100%);
  color: var(--text);
}

a {
  color: inherit;
  text-decoration: none;
}

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

button {
  border: 0;
  border-radius: 12px;
  padding: 11px 16px;
  background: var(--brand);
  color: #fff;
  cursor: pointer;
}

button.secondary {
  background: var(--surface-soft);
  color: var(--text);
}

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

button.ghost {
  background: transparent;
  color: var(--brand);
  padding: 0;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  background: var(--surface-plain);
  color: var(--text);
}

textarea {
  min-height: 140px;
  resize: vertical;
}

.app-shell {
  min-height: 100vh;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 88%, transparent);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(16px);
}

.topbar-inner,
.page,
.footer {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 0;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.brand strong {
  font-size: 1.05rem;
}

.brand span {
  color: var(--muted);
  font-size: 0.92rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.nav a,
.nav button {
  padding: 10px 12px;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
}

.nav a.active {
  background: var(--brand-soft);
  color: var(--brand);
}

.page {
  padding: 32px 0 48px;
}

.hero,
.panel,
.card,
.stat,
.empty-state,
.table-wrap,
.review-card,
.profile-card,
.teacher-header,
.admin-hero {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero,
.admin-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(320px, 0.9fr);
  gap: 22px;
  padding: 28px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--brand);
  font-size: 0.86rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4,
p {
  margin: 0;
}

.hero h1,
.admin-hero h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.05;
  margin-bottom: 12px;
}

.hero p,
.admin-hero p,
.muted {
  color: var(--muted);
}

.hero-actions,
.inline-actions,
.filter-row,
.meta-row,
.form-row,
.score-grid,
.quick-stats,
.chip-list,
.admin-grid,
.teacher-grid,
.review-toolbar,
.review-actions,
.table-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.grid-3,
.grid-2,
.teacher-layout,
.admin-layout,
.profile-layout {
  display: grid;
  gap: 18px;
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.teacher-layout {
  grid-template-columns: minmax(0, 1.36fr) minmax(320px, 0.84fr);
  align-items: start;
  --teacher-left-fr: 1.36fr;
  --teacher-right-min: 320px;
  --teacher-right-fr: 0.84fr;
}

.admin-layout,
.profile-layout {
  grid-template-columns: 260px minmax(0, 1fr);
  align-items: start;
}

.stack {
  display: grid;
  gap: 18px;
}

.card,
.panel,
.stat,
.review-card,
.profile-card,
.teacher-header,
.table-wrap,
.empty-state {
  padding: 20px;
}

.stat strong {
  display: block;
  font-size: 2rem;
  margin-top: 8px;
}

.stat small,
.hint {
  color: var(--muted);
}

.teacher-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  align-items: start;
}

.teacher-card-top {
  display: grid;
  grid-template-columns: 168px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.avatar,
.teacher-photo {
  display: grid;
  place-items: center;
  border-radius: 18px;
  background: linear-gradient(135deg, #dce5fb 0%, #f3f7ff 100%);
  color: var(--brand);
  font-weight: 700;
}

img.avatar,
img.teacher-photo {
  object-fit: cover;
}

.avatar {
  width: 132px;
  height: 132px;
  font-size: 1.4rem;
}

.teacher-card > .photo-button,
.teacher-card > .avatar {
  justify-self: start;
}

.teacher-card > .stack {
  min-width: 0;
}

.teacher-card-main {
  display: grid;
  gap: 10px;
  min-width: 0;
}

.teacher-card-bottom {
  display: grid;
  gap: 12px;
  margin-top: 0;
}

.teacher-card-body {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px 14px;
  align-content: start;
  min-width: 0;
}

.teacher-card-copy {
  display: grid;
  grid-column: 1 / -1;
  gap: 8px;
}

.teacher-card .meta-row {
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.teacher-card .meta-row .chip {
  flex-shrink: 0;
}

.teacher-card h3 {
  line-height: 1.15;
  margin-bottom: 6px;
}

.teacher-card .muted {
  line-height: 1.4;
}

.teacher-card-contact {
  display: grid;
  gap: 4px;
  margin-top: 0;
  line-height: 1.45;
}

.teacher-photo {
  width: 176px;
  height: 176px;
  font-size: 2rem;
}

.chip,
.status-pill,
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 0.86rem;
}

.chip,
.tag {
  background: var(--surface-soft);
  color: var(--brand);
}

.status-pill.approved {
  background: #dcfae6;
  color: var(--success);
}

.status-pill.pending {
  background: #fff1d6;
  color: var(--warning);
}

.status-pill.rejected {
  background: #fde7e7;
  color: var(--danger);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 0;
}

.metric {
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--surface-soft);
  min-width: 0;
  min-height: 0;
  display: grid;
  align-content: center;
  gap: 6px;
}

.metric-tags strong {
  line-height: 1.35;
}

.metric strong {
  display: block;
  font-size: 1rem;
  line-height: 1.2;
  margin-bottom: 0;
}

.metrics .metric:last-child {
  grid-column: auto;
}

.metric span {
  line-height: 1.3;
  word-break: break-word;
}

.teacher-header {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 18px;
  align-items: center;
}

.teacher-title {
  display: grid;
  gap: 8px;
}

.teacher-meta {
  display: grid;
  gap: 10px;
}

.info-list {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.info-item {
  display: grid;
  gap: 4px;
}

.info-item small {
  color: var(--muted);
}

.project-item {
  display: grid;
  gap: 8px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(240, 244, 255, 0.55);
}

.snapshot-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
}

.compact-stack {
  gap: 10px;
}

.teaching-snapshot-card {
  min-height: 0;
}

.teaching-snapshot-card .snapshot-grid {
  gap: 12px 18px;
  align-content: start;
  min-height: 0;
}

.teaching-snapshot-card .info-item {
  gap: 6px;
}

.teaching-snapshot-card .snapshot-news {
  grid-column: 1 / -1;
}

.teaching-snapshot-card .chip-list {
  gap: 8px;
}

.teaching-snapshot-card .compact-stack {
  gap: 8px;
}

.research-topics-card {
  min-height: 0;
}

.research-topics-card .info-list,
.research-topics-card .chip-list,
.research-topics-card .stack {
  gap: 10px;
}

.research-topics-card .info-item {
  gap: 8px;
}

.news-card .stack {
  gap: 10px;
}

.news-item a {
  font-weight: 600;
}

.radar-card {
  min-height: 260px;
}

.radar-card .meta-row {
  align-items: center;
}

.radar-card-embedded {
  min-height: 0;
  padding: 0;
  background: transparent;
  border: 0;
  box-shadow: none;
}

.radar-chart {
  width: 100%;
  max-width: 280px;
  margin: 4px auto 0;
  display: block;
}

.radar-ring {
  fill: color-mix(in srgb, var(--surface-soft) 78%, transparent);
  stroke: color-mix(in srgb, var(--border) 92%, transparent);
  stroke-width: 1;
}

.radar-spoke {
  stroke: color-mix(in srgb, var(--border-strong) 42%, transparent);
  stroke-width: 1;
}

.radar-area {
  fill: color-mix(in srgb, var(--accent) 18%, transparent);
}

.radar-outline {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2.5;
}

.radar-dot {
  fill: var(--accent);
  stroke: var(--surface);
  stroke-width: 2;
}

.radar-label {
  fill: var(--text-soft);
  font-size: 11px;
  font-weight: 600;
}

.score-grid {
  margin-top: 18px;
}

.score-cell {
  flex: 1 1 150px;
  padding: 14px;
  border-radius: 16px;
  background: var(--surface-soft);
}

.score-cell strong {
  display: block;
  font-size: 1.5rem;
  margin-bottom: 4px;
}

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

.bar-row {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) 44px;
  gap: 12px;
  align-items: center;
}

.bar-track {
  height: 10px;
  border-radius: 999px;
  background: #e8eef8;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--brand) 0%, #4e79e8 100%);
}

.review-card {
  display: grid;
  gap: 14px;
}

.review-top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

.review-meta {
  display: grid;
  gap: 6px;
}

.review-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.review-cell {
  padding: 10px;
  border-radius: 14px;
  background: var(--surface-soft);
}

.review-cell span {
  display: block;
  color: var(--muted);
  font-size: 0.86rem;
  margin-bottom: 4px;
}

.review-image-button,
.comment-image-preview-button {
  padding: 0;
  border: 0;
  background: transparent;
  border-radius: 18px;
  overflow: hidden;
  cursor: pointer;
}

.review-image-grid,
.comment-image-preview-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.review-image,
.comment-image-preview-image {
  display: block;
  width: 100%;
  max-width: none;
  aspect-ratio: 1 / 1;
  border-radius: 18px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  object-fit: cover;
}

.comment-image-preview-grid.hidden {
  display: none;
}

.comment-image-input {
  padding: 10px 12px;
  border: 1px dashed var(--line);
  border-radius: 14px;
  background: var(--surface-plain);
}

.review-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 18px 28px;
  align-items: start;
}

.review-form > .grid-2 {
  grid-column: 2;
  grid-row: 1 / span 4;
  padding-left: 24px;
  border-left: 1px solid var(--line);
  align-content: start;
}

.review-form > label.stack {
  grid-column: 1;
  grid-row: 1;
}

.review-form > label.checkbox:nth-of-type(1) {
  grid-column: 1;
  grid-row: 2;
}

.review-form > label.checkbox:nth-of-type(2) {
  grid-column: 1;
  grid-row: 3;
}

.review-form > .tag-grid {
  grid-column: 1;
  grid-row: 4;
}

.review-form > .inline-actions {
  grid-column: 1 / -1;
  grid-row: 5;
}

.review-form > label.stack textarea {
  min-height: 184px;
}

.teacher-layout > aside .review-form {
  grid-template-columns: 1fr;
  gap: 16px;
}

.teacher-layout > aside .review-form > .grid-2,
.teacher-layout > aside .review-form > label.stack,
.teacher-layout > aside .review-form > label.checkbox:nth-of-type(1),
.teacher-layout > aside .review-form > label.checkbox:nth-of-type(2),
.teacher-layout > aside .review-form > .tag-grid,
.teacher-layout > aside .review-form > .inline-actions {
  grid-column: auto;
  grid-row: auto;
}

.teacher-layout > aside .review-form > .grid-2 {
  order: 1;
  padding-left: 0;
  border-left: 0;
}

.teacher-layout > aside .review-form > label.checkbox:nth-of-type(1) {
  order: 2;
}

.teacher-layout > aside .review-form > label.checkbox:nth-of-type(2) {
  order: 3;
}

.teacher-layout > aside .review-form > .tag-grid {
  order: 4;
}

.teacher-layout > aside .review-form > label.stack {
  order: 5;
}

.teacher-layout > aside .review-form > label.stack textarea {
  min-height: 220px;
}

.teacher-layout > aside .review-form > .inline-actions {
  order: 6;
}

.review-compose-layout {
  display: grid;
  grid-template-columns: minmax(0, var(--teacher-left-fr)) minmax(var(--teacher-right-min), var(--teacher-right-fr));
  gap: 18px;
  margin-top: 8px;
}

.review-entry-card {
  grid-column: 1 / -1;
  border-color: color-mix(in srgb, var(--brand) 34%, var(--line));
  background:
    radial-gradient(circle at 96% 0%, color-mix(in srgb, var(--brand) 12%, transparent), transparent 34%),
    var(--surface);
}

.review-entry-card > .muted {
  margin-top: -4px;
}

.teacher-layout > section > .card:has(#review-filter-form) {
  min-height: 360px;
}

.review-compose-main textarea {
  min-height: 250px;
}

.review-compose-ratings {
  position: relative;
  margin-top: 0;
  padding: 16px;
  padding-top: 16px;
}

.review-radar-host {
  position: static;
  margin: 4px 0 8px;
  order: 2;
}

.review-compose-ratings > h2 {
  order: 1;
  margin-bottom: 0;
  font-size: 1.75rem;
}

.review-compose-ratings .grid-2 {
  order: 3;
  align-content: start;
  gap: 10px;
}

.review-radar-host .meta-row {
  margin-bottom: 6px;
}

.review-radar-host .radar-chart {
  max-width: 208px;
  margin-top: 0;
}

.radar-card-embedded {
  min-height: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.rating-field {
  gap: 6px;
}

.rating-slider {
  display: grid;
  gap: 6px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
}

.rating-range {
  padding: 0;
  accent-color: var(--brand);
}

.rating-scale {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 0.72rem;
}

.rating-value {
  color: var(--brand);
  font-size: 0.88rem;
}

.photo-button {
  padding: 0;
  background: transparent;
  border-radius: 18px;
}

.photo-button-large {
  justify-self: start;
}

.photo-modal {
  position: fixed;
  inset: 0;
  z-index: 40;
}

.photo-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(16, 24, 40, 0.6);
}

.photo-modal-dialog {
  position: relative;
  z-index: 1;
  width: min(92vw, 760px);
  margin: 6vh auto 0;
  padding: 18px;
  border-radius: 20px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.photo-modal-close {
  margin-left: auto;
  display: block;
}

.photo-modal-image {
  display: block;
  width: 100%;
  max-height: 72vh;
  object-fit: contain;
  border-radius: 16px;
  margin-top: 12px;
}

.checkbox-row,
.tag-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.checkbox,
.tag-option {
  display: inline-flex;
  align-items: center;
  gap: 0;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.checkbox input,
.tag-option input {
  width: auto;
}

.tag-option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.tag-option:has(input:checked) {
  background: rgba(39, 79, 201, 0.12);
  border-color: rgba(39, 79, 201, 0.32);
  color: var(--brand);
}

.sidebar {
  display: grid;
  gap: 10px;
  padding: 18px;
  position: sticky;
  top: 90px;
}

.sidebar a {
  padding: 10px 12px;
  border-radius: 12px;
  color: var(--muted);
}

.sidebar a.active {
  background: var(--brand-soft);
  color: var(--brand);
}

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

.table th,
.table td {
  padding: 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.table th {
  color: var(--muted);
  font-weight: 600;
}

.footer {
  padding: 0 0 36px;
  color: var(--muted);
}

.ligonghui-auth-slot {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
}

.auth-user {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 8px 22px rgba(16, 24, 40, 0.08);
}

.auth-avatar,
.auth-avatar-fallback {
  width: 28px;
  height: 28px;
  border-radius: 50%;
}

.auth-avatar {
  object-fit: cover;
}

.auth-avatar-fallback {
  display: inline-grid;
  place-items: center;
  color: #fff;
  font-weight: 800;
  background: linear-gradient(135deg, #2f6fed, #22a06b);
}

.auth-name {
  max-width: 128px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text);
  font-size: 0.88rem;
  font-weight: 700;
}

.auth-logout {
  padding: 6px 10px;
  border: 0;
  border-radius: 999px;
  color: var(--brand);
  background: var(--brand-soft);
  cursor: pointer;
}

.auth-config-warning {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  color: #8a4b00;
  background: #fff3d8;
  font-size: 0.86rem;
  font-weight: 700;
}

.hidden {
  display: none;
}

@media (max-width: 980px) {
  .hero,
  .admin-hero,
  .teacher-layout,
  .admin-layout,
  .profile-layout {
    grid-template-columns: 1fr;
  }

  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .metrics,
  .review-grid,
  .snapshot-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .topbar-inner {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    padding: 12px 0;
  }

  .nav {
    gap: 6px;
  }

  .nav a,
  .nav button {
    padding: 8px 10px;
    font-size: 0.82rem;
  }

  .metrics,
  .review-grid,
  .snapshot-grid {
    grid-template-columns: 1fr;
  }

  .teacher-card,
  .teacher-header {
    grid-template-columns: 1fr;
  }

  .teacher-card-top {
    grid-template-columns: 100px minmax(0, 1fr);
    gap: 12px;
  }

  .teacher-photo {
    width: 100px;
    height: 100px;
    font-size: 1.4rem;
  }

  .teacher-card-body {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .review-form {
    grid-template-columns: 1fr;
  }

  .review-form > .grid-2,
  .review-form > label.stack,
  .review-form > label.checkbox:nth-of-type(1),
  .review-form > label.checkbox:nth-of-type(2),
  .review-form > .tag-grid,
  .review-form > .inline-actions {
    grid-column: auto;
    grid-row: auto;
  }

  .review-form > .grid-2 {
    padding-left: 0;
    border-left: 0;
  }

  .review-compose-layout {
    grid-template-columns: 1fr;
  }

  .review-compose-ratings {
    margin-top: 0;
    padding-top: 20px;
  }

  .review-radar-host {
    position: static;
    margin-bottom: 10px;
  }

  .review-top {
    flex-direction: column;
  }

  .score-cell {
    flex: 1 1 120px;
  }
}

@media (max-width: 480px) {
  .topbar-inner,
  .page,
  .footer {
    width: calc(100% - 24px);
  }

  .hero,
  .admin-hero {
    padding: 20px;
  }

  .card,
  .panel,
  .stat,
  .review-card,
  .profile-card,
  .teacher-header,
  .table-wrap,
  .empty-state {
    padding: 16px;
  }

  .teacher-card-top {
    grid-template-columns: 1fr;
  }

  .teacher-photo {
    width: 80px;
    height: 80px;
  }

  .stat strong {
    font-size: 1.5rem;
  }

  .metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}