:root {
  color-scheme: light;
  --bg: #f5f2ec;
  --bg-alt: #eef2f7;
  --panel: #ffffff;
  --ink: #1f2937;
  --muted: #6b7280;
  --accent: #9a3412;
  --accent-2: #0f766e;
  --line: #dde3ea;
  --soft: #f8fafc;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.72), rgba(255,255,255,0.72)),
    linear-gradient(135deg, var(--bg) 0%, var(--bg-alt) 100%);
  color: var(--ink);
}

a { color: var(--accent); text-decoration: none; }

.page { min-height: 100vh; }

.topbar, .footer, .content {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
}

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

.topbar--admin {
  align-items: flex-start;
}

.brand__name { font-size: 28px; font-weight: 700; }
.brand__desc { color: var(--muted); margin-top: 4px; }

.nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.admin-nav {
  flex: 1 1 auto;
  justify-content: center;
}

.nav a {
  padding: 8px 10px;
  border-radius: 8px;
  color: var(--ink);
}

.admin-nav a {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid transparent;
}

.admin-nav a[aria-current="page"] {
  background: rgba(15, 118, 110, 0.12);
  border-color: rgba(15, 118, 110, 0.24);
  color: var(--accent-2);
  font-weight: 700;
}

.nav a:hover,
.nav a:focus-visible {
  background: var(--soft);
  outline: none;
}

.hero, .section, .detail, .footer {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 18px;
}

.breadcrumb {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  margin: 0 0 14px;
  color: var(--muted);
}

.breadcrumb__label,
.breadcrumb__sep {
  color: var(--muted);
}

.breadcrumb a {
  color: var(--ink);
}

.breadcrumb__current {
  color: var(--accent-2);
  font-weight: 700;
}

.hero h1, .section h1, .detail h1 { margin-top: 0; }

.hero--split {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(240px, 1fr);
  gap: 18px;
  align-items: stretch;
  background:
    linear-gradient(135deg, rgba(15, 118, 110, 0.08), rgba(154, 52, 18, 0.08)),
    var(--panel);
}

.hero__copy h1 {
  font-size: 38px;
  line-height: 1.1;
}

.hero__copy p {
  max-width: 62ch;
}

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

.hero__stat {
  display: grid;
  gap: 6px;
  align-content: center;
  padding: 16px;
  border-radius: 8px;
  background: var(--soft);
  border: 1px solid var(--line);
}

.hero__stat strong {
  font-size: 28px;
  color: var(--accent-2);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent-2);
  font-weight: 700;
}

.section--title h1 {
  font-size: 30px;
}

.section__head {
  margin-bottom: 14px;
}

.admin-page-header {
  display: grid;
  gap: 10px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(15, 118, 110, 0.08), rgba(154, 52, 18, 0.05));
}

.admin-page-header h1 {
  margin: 0 0 8px;
  font-size: 30px;
}

.admin-page-header__actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.admin-page-header__note {
  margin: 0;
}

.auth-page .content,
.admin-page .content {
  width: min(1440px, calc(100% - 24px));
}

.auth-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 320px);
  gap: 18px;
  align-items: start;
}

.auth-panel,
.auth-rail,
.admin-form-layout__main,
.admin-form-layout__rail {
  display: grid;
  gap: 16px;
}

.auth-panel,
.auth-note,
.admin-form-layout__main .admin-dashboard__panel,
.admin-form-layout__rail .admin-dashboard__rail-card {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.03);
}

.auth-panel h1,
.auth-note h2 {
  margin: 0 0 8px;
}

.auth-form,
.admin-form {
  max-width: none;
  gap: 14px;
}

.admin-form-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 320px);
  gap: 18px;
  align-items: start;
}

.admin-form-layout__main,
.admin-form-layout__rail {
  display: grid;
  gap: 18px;
}

.admin-form-layout__main .admin-dashboard__panel {
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
}

.admin-form-layout__main .admin-form {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
}

.admin-form-layout__rail .admin-dashboard__rail-card {
  min-height: fit-content;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.summary-card {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
}

.summary-card h3 {
  margin-top: 0;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}

.card {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.03);
}

.card h3 { margin-top: 0; }
.muted { color: var(--muted); }
.section--links,
.section-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.admin-user {
  display: grid;
  gap: 6px;
  justify-items: end;
  align-content: start;
  min-width: 140px;
}

.admin-user__label,
.admin-user__meta {
  color: var(--muted);
  font-size: 13px;
}

.admin-user__name {
  font-size: 15px;
}

.admin-user button,
.section-actions button {
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--soft);
  color: var(--ink);
  box-shadow: none;
}

.admin-user button:hover,
.section-actions button:hover,
.button:hover,
.admin-actions button:hover,
.search-inline button:hover,
.form button:hover,
.quiz-toolbar button:hover {
  border-color: rgba(15, 118, 110, 0.28);
  background: rgba(15, 118, 110, 0.08);
}

.button:focus-visible,
.admin-user button:focus-visible,
.section-actions button:focus-visible,
.admin-actions button:focus-visible,
.search-inline button:focus-visible,
.form button:focus-visible,
.quiz-toolbar button:focus-visible,
.admin-dashboard__shortcuts a:focus-visible,
.admin-sidebar__nav a:focus-visible {
  outline: 2px solid rgba(15, 118, 110, 0.35);
  outline-offset: 2px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--line);
  color: var(--accent-2);
  background: var(--soft);
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.03);
}

.button--solid {
  color: #fff;
  background: rgba(15, 118, 110, 0.92);
}

.button:hover,
.button:focus-visible {
  border-color: rgba(15, 118, 110, 0.28);
  background: rgba(15, 118, 110, 0.08);
}

.button--solid:hover,
.button--solid:focus-visible {
  color: #fff;
  background: rgba(15, 118, 110, 0.82);
}

.admin-page {
  width: min(1440px, calc(100% - 24px));
  margin: 0 auto;
  padding: 12px 0 24px;
}

.admin-shell {
  display: grid;
  grid-template-columns: minmax(250px, 280px) minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  min-height: calc(100vh - 36px);
}

.admin-sidebar {
  position: sticky;
  top: 12px;
  display: grid;
  gap: 16px;
  align-self: start;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.03);
}

.admin-sidebar__brand {
  display: grid;
  gap: 6px;
}

.admin-sidebar__eyebrow {
  color: var(--accent-2);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.admin-sidebar__title {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.2;
}

.admin-sidebar__desc {
  color: var(--muted);
  line-height: 1.6;
}

.admin-sidebar__nav {
  display: grid;
  gap: 14px;
}

.admin-sidebar__group {
  display: grid;
  gap: 7px;
}

.admin-sidebar__group-title {
  padding: 0 4px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.admin-sidebar__group-links {
  display: grid;
  gap: 7px;
}

.admin-sidebar__nav a,
.admin-dashboard__shortcuts a,
.topbar--admin .admin-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.02);
  transition: border-color 120ms ease, background-color 120ms ease, color 120ms ease;
}

.admin-sidebar__nav a:hover,
.admin-sidebar__nav a:focus-visible,
.admin-dashboard__shortcuts a:hover,
.admin-dashboard__shortcuts a:focus-visible,
.topbar--admin .admin-nav a:hover,
.topbar--admin .admin-nav a:focus-visible {
  border-color: rgba(15, 118, 110, 0.28);
  background: rgba(15, 118, 110, 0.06);
  color: var(--accent-2);
  outline: none;
}

.admin-sidebar__nav a[aria-current="page"],
.admin-dashboard__shortcuts a[aria-current="page"],
.topbar--admin .admin-nav a[aria-current="page"] {
  border-color: rgba(15, 118, 110, 0.22);
  background: rgba(15, 118, 110, 0.12);
  color: var(--accent-2);
  font-weight: 700;
}

.admin-sidebar__meta {
  display: grid;
  gap: 4px;
  padding-top: 4px;
  border-top: 1px solid var(--line);
}

.admin-sidebar__user {
  font-weight: 700;
}

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

.admin-sidebar__logout button {
  width: 100%;
}

.admin-dashboard {
  display: grid;
  gap: 18px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.84);
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.03);
}

.admin-dashboard--compact {
  gap: 16px;
}

.admin-dashboard__hero {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  padding: 20px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.03);
}

.admin-dashboard__hero h1 {
  margin: 0 0 8px;
  font-size: 34px;
}

.admin-dashboard__hero-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.admin-dashboard__hero-actions form {
  margin: 0;
}

.admin-page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 340px);
  gap: 18px;
  align-items: start;
}

.admin-page-layout__main,
.admin-page-layout__rail {
  display: grid;
  gap: 18px;
}

.admin-record {
  display: grid;
  gap: 12px;
}

.admin-record__head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
}

.admin-record__head h3 {
  margin: 0 0 4px;
}

.admin-record__head p {
  margin: 0;
}

.admin-record__meta {
  display: grid;
  gap: 4px;
}

.admin-record__form {
  margin-top: 0;
  max-width: none;
}

.admin-dashboard__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 340px);
  gap: 18px;
  align-items: start;
}

.admin-dashboard__main,
.admin-dashboard__rail {
  display: grid;
  gap: 18px;
}

.admin-dashboard__panel,
.admin-dashboard__rail-card {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.03);
}

.admin-dashboard__panel h2,
.admin-dashboard__rail-card h2 {
  margin: 0;
}

.admin-dashboard__name {
  font-size: 22px;
  font-weight: 700;
  margin: 0;
}

.summary-grid--dashboard {
  grid-template-columns: repeat(auto-fit, minmax(112px, 1fr));
  gap: 6px;
}

.summary-card--link {
  display: grid;
  align-content: start;
  gap: 1px;
  min-height: 64px;
  padding: 8px 10px;
  color: inherit;
}

.summary-card--link h3 {
  margin: 0;
  font-size: 11px;
  line-height: 1.2;
  color: var(--muted);
  font-weight: 500;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}

.summary-card--link strong {
  font-size: 18px;
  line-height: 1.1;
  color: var(--accent-2);
  font-variant-numeric: tabular-nums;
}

.admin-dashboard__section-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: baseline;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.admin-dashboard__section-head h2,
.admin-dashboard__section-head h3 {
  margin: 0;
}

.admin-dashboard__tasks {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.admin-dashboard__task {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  display: grid;
  gap: 12px;
}

.admin-dashboard__task-head {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: baseline;
}

.admin-dashboard__task-head h3 {
  margin: 0;
}

.admin-dashboard__task-list {
  display: grid;
  gap: 12px;
}

.admin-dashboard__task-item {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--soft);
  display: grid;
  gap: 6px;
}

.admin-dashboard__task-item strong,
.admin-dashboard__task-item p {
  margin: 0;
}

.admin-dashboard__task-item a {
  width: fit-content;
  color: var(--accent-2);
  font-weight: 700;
}

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

.admin-dashboard__activity-list {
  display: grid;
  gap: 12px;
}

.admin-dashboard__activity-kind {
  margin: 0 0 4px;
  color: var(--accent-2);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.admin-dashboard__timeline {
  display: grid;
  gap: 12px;
}

.admin-dashboard__timeline-item {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.admin-dashboard__timeline-marker {
  width: 10px;
  height: 10px;
  margin-top: 6px;
  border-radius: 999px;
  background: var(--accent-2);
  box-shadow: 0 0 0 4px rgba(15, 118, 110, 0.12);
}

.admin-dashboard__timeline-body {
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--soft);
  display: grid;
  gap: 6px;
}

.admin-dashboard__timeline-head {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: flex-start;
}

.admin-dashboard__timeline-body h3 {
  margin: 0;
  font-size: 16px;
  line-height: 1.4;
}

.admin-dashboard__timeline-body p {
  margin: 0;
}

.admin-dashboard__timeline-time {
  font-size: 12px;
  color: var(--muted);
}

.admin-dashboard__pill {
  flex: 0 0 auto;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(15, 118, 110, 0.08);
  color: var(--accent-2);
  font-size: 12px;
  font-weight: 700;
}

.admin-dashboard__pill--neutral {
  background: rgba(107, 114, 128, 0.12);
  color: #4b5563;
}

.admin-dashboard__pill--success {
  background: rgba(15, 118, 110, 0.1);
  color: var(--accent-2);
}

.admin-dashboard__pill--warning {
  background: rgba(217, 119, 6, 0.12);
  color: #b45309;
}

.admin-dashboard__pill--danger {
  background: rgba(154, 52, 18, 0.12);
  color: var(--accent);
}

.search-inline {
  display: flex;
  gap: 10px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.search-inline input {
  flex: 1 1 280px;
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
}

.search-inline button {
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--soft);
  color: var(--ink);
  font: inherit;
}

.quiz-shell {
  display: grid;
  gap: 16px;
}

.quiz-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.quiz-timer {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 96px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
  color: var(--accent-2);
  font-weight: 700;
  letter-spacing: 0;
}

.quiz-toolbar button {
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--soft);
  color: var(--ink);
  font: inherit;
}

.quiz-result {
  min-height: 24px;
  color: var(--accent-2);
  font-weight: 700;
}

.quiz-options {
  display: grid;
  gap: 10px;
  margin: 12px 0 0;
}

.quiz-option {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
}

.quiz-option input {
  margin-top: 3px;
}

.quiz-option span {
  display: block;
  line-height: 1.45;
}

.quiz-question--correct {
  border-color: rgba(15, 118, 110, 0.45);
  background: rgba(15, 118, 110, 0.05);
}

.quiz-question--wrong {
  border-color: rgba(154, 52, 18, 0.45);
  background: rgba(154, 52, 18, 0.05);
}

.quiz-feedback {
  min-height: 1.2em;
  margin-top: 10px;
  color: var(--muted);
}

.quiz-question--correct .quiz-feedback {
  color: var(--accent-2);
}

.quiz-question--wrong .quiz-feedback {
  color: var(--accent);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(15, 118, 110, 0.92);
  color: #fff;
}

.form {
  display: grid;
  gap: 12px;
  max-width: 520px;
}

.form label { display: grid; gap: 6px; }
.form input, .form textarea, .form select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
}

.content-editor {
  display: grid;
  gap: 10px;
}

.markdown-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.markdown-toolbar button {
  min-width: 40px;
  padding: 7px 10px;
  background: #fff;
  color: var(--text);
}

.content-editor__preview {
  min-height: 84px;
  padding: 12px;
  border: 1px dashed var(--line);
  border-radius: 8px;
  background: #f8fafc;
  color: var(--muted);
}

.rich-content {
  display: grid;
  gap: 10px;
  line-height: 1.8;
}

.rich-content h2,
.rich-content h3,
.rich-content p,
.rich-content ul,
.rich-content ol,
.rich-content blockquote,
.rich-content pre,
.rich-content table {
  margin: 0;
}

.rich-content ul,
.rich-content ol {
  padding-left: 22px;
}

.rich-content blockquote,
.content-editor__preview blockquote {
  padding: 8px 12px;
  border-left: 4px solid var(--accent);
  background: #f8fafc;
}

.rich-content code,
.content-editor__preview code {
  padding: 2px 5px;
  border-radius: 4px;
  background: #eef2f7;
}

.rich-content pre,
.content-editor__preview pre {
  overflow-x: auto;
  padding: 12px;
  border-radius: 8px;
  background: #0f172a;
  color: #e2e8f0;
}

.rich-content pre code,
.content-editor__preview pre code {
  padding: 0;
  background: transparent;
  color: inherit;
}

.rich-content table,
.content-editor__preview table {
  width: 100%;
  border-collapse: collapse;
}

.rich-content th,
.rich-content td,
.content-editor__preview th,
.content-editor__preview td {
  padding: 8px 10px;
  border: 1px solid var(--line);
  text-align: left;
}

.rich-content hr,
.content-editor__preview hr {
  width: 100%;
  border: 0;
  border-top: 1px solid var(--line);
}

.form button {
  width: fit-content;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(15, 118, 110, 0.92);
  color: white;
  font: inherit;
}

.admin-list {
  display: grid;
  gap: 14px;
}

.admin-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.admin-actions form {
  margin: 0;
}

.admin-actions button {
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--soft);
  color: var(--ink);
  font: inherit;
}

.admin-actions a.button {
  padding: 10px 14px;
}

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

.admin-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(520px, 860px);
}

.admin-modal__backdrop {
  background: rgba(15, 23, 42, 0.42);
}

.admin-modal__panel {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  min-width: 0;
  height: 100vh;
  background: #fff;
  box-shadow: -16px 0 36px rgba(15, 23, 42, 0.22);
}

.admin-modal__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
}

.admin-modal__head h2 {
  margin: 0;
}

.admin-modal__head button {
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  font: inherit;
}

.admin-modal__body {
  min-width: 0;
  overflow: auto;
  padding: 22px;
}

.admin-modal-form {
  max-width: none;
}

.admin-modal-open {
  overflow: hidden;
}

.detail--panel {
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.03);
}

.footer {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(180px, 0.8fr) minmax(220px, 1fr);
  gap: 16px;
}

.footer__brand,
.footer__group {
  display: grid;
  gap: 8px;
  align-content: start;
}

.footer__title {
  font-weight: 700;
}

.footer__desc,
.footer__label {
  color: var(--muted);
}

.footer__group a {
  width: fit-content;
}

.empty {
  padding: 16px;
  color: var(--muted);
  border: 1px dashed var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.5);
}

.error {
  padding: 12px 14px;
  border-radius: 8px;
  border: 1px solid rgba(154, 52, 18, 0.18);
  background: rgba(154, 52, 18, 0.08);
  color: #9a3412;
}

.activity-list-page {
  display: grid;
  gap: 18px;
}

.activity-hero {
  display: grid;
  gap: 14px;
}

.activity-summary .summary-card p {
  margin: 0;
  color: var(--accent-2);
  font-size: 22px;
  font-weight: 700;
}

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

.activity-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: start;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.03);
}

.activity-card__main,
.activity-card__head {
  display: grid;
  gap: 8px;
}

.activity-card__head h3,
.activity-card__head p,
.activity-card__main > p {
  margin: 0;
}

.activity-card__actions {
  display: flex;
  justify-content: flex-end;
}

.activity-meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}

.activity-meta-grid span {
  display: grid;
  gap: 4px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
}

.activity-meta-grid strong {
  color: var(--muted);
  font-size: 12px;
}

.activity-detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
  gap: 18px;
  align-items: start;
}

.activity-detail-main {
  display: grid;
  gap: 16px;
}

.activity-signup-panel {
  position: sticky;
  top: 14px;
  display: grid;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.03);
}

.activity-signup-panel__head,
.activity-signup-panel__stats {
  display: grid;
  gap: 8px;
}

.activity-signup-panel__head h2,
.activity-signup-panel__head p {
  margin: 0;
}

.activity-signup-panel__stats span {
  display: grid;
  gap: 4px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
}

.activity-signup-panel__stats strong {
  color: var(--muted);
  font-size: 12px;
}

.activity-signup-form {
  max-width: none;
}

.activity-materials {
  display: grid;
  gap: 12px;
}

.admin-activity-overview .summary-card p {
  margin: 0;
  color: var(--accent-2);
  font-size: 20px;
  font-weight: 700;
}

.admin-activity-record {
  gap: 14px;
}

.admin-signup-overview .summary-card p {
  margin: 0;
  color: var(--accent-2);
  font-size: 20px;
  font-weight: 700;
}

.signup-record {
  gap: 14px;
}

.signup-record__identity {
  display: grid;
  gap: 4px;
}

.signup-record__badges,
.signup-record__actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.signup-record__actions form {
  margin: 0;
}

.signup-record__form {
  grid-template-columns: minmax(180px, 240px) minmax(0, 1fr) auto;
  align-items: end;
}

@media (max-width: 720px) {
  .admin-modal {
    grid-template-columns: 1fr;
  }

  .admin-modal__backdrop {
    display: none;
  }

  .admin-modal__panel {
    width: 100%;
  }

  .admin-modal__body {
    padding: 16px;
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .topbar--admin {
    gap: 12px;
  }

  .admin-nav {
    justify-content: flex-start;
  }

  .admin-user {
    justify-items: start;
  }

  .hero--split {
    grid-template-columns: 1fr;
  }

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

  .admin-page {
    width: min(1080px, calc(100% - 24px));
  }

  .admin-shell,
  .admin-dashboard__layout,
  .admin-dashboard__tasks,
  .admin-page-layout,
  .admin-form-layout,
  .auth-layout {
    grid-template-columns: 1fr;
  }

  .admin-sidebar {
    position: static;
  }

  .admin-dashboard__hero {
    flex-direction: column;
  }

  .admin-dashboard__section-head {
    align-items: flex-start;
  }

  .admin-record__head {
    flex-direction: column;
  }

  .admin-dashboard__timeline-item {
    grid-template-columns: 10px minmax(0, 1fr);
  }

  .hero__copy h1 {
    font-size: 32px;
  }

  .footer {
    grid-template-columns: 1fr;
  }

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

  .activity-card__actions {
    justify-content: flex-start;
  }

  .activity-detail-layout {
    grid-template-columns: 1fr;
  }

  .activity-signup-panel {
    position: static;
  }

  .signup-record__form {
    grid-template-columns: 1fr;
  }
}