:root {
  --bg: #edf3fb;
  --bg-2: #f8fbff;
  --surface: rgba(255, 255, 255, 0.62);
  --surface-strong: rgba(255, 255, 255, 0.82);
  --surface-soft: rgba(255, 255, 255, 0.4);
  --text: #172033;
  --muted: #667085;
  --line: rgba(120, 144, 180, 0.24);
  --line-strong: rgba(120, 144, 180, 0.36);
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --accent: #0f766e;
  --danger: #d33d3d;
  --success-bg: rgba(16, 185, 129, 0.14);
  --success-text: #047857;
  --error-bg: rgba(239, 68, 68, 0.14);
  --error-text: #b42323;
  --shadow: 0 22px 70px rgba(31, 41, 55, 0.13);
  --soft-shadow: 0 10px 28px rgba(31, 41, 55, 0.08);
  --blur: blur(24px) saturate(145%);
}

:root[data-theme="dark"] {
  --bg: #08111f;
  --bg-2: #10192a;
  --surface: rgba(18, 28, 45, 0.62);
  --surface-strong: rgba(22, 34, 54, 0.82);
  --surface-soft: rgba(255, 255, 255, 0.08);
  --text: #eef4ff;
  --muted: #a9b5c7;
  --line: rgba(212, 225, 255, 0.16);
  --line-strong: rgba(212, 225, 255, 0.26);
  --primary: #6ea8ff;
  --primary-dark: #9bc2ff;
  --accent: #5eead4;
  --danger: #ff7b7b;
  --success-bg: rgba(45, 212, 191, 0.14);
  --success-text: #7dd3fc;
  --error-bg: rgba(248, 113, 113, 0.16);
  --error-text: #fecaca;
  --shadow: 0 22px 70px rgba(0, 0, 0, 0.34);
  --soft-shadow: 0 10px 28px rgba(0, 0, 0, 0.22);
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light;
}

html[data-theme="dark"] {
  color-scheme: dark;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 12% 8%, rgba(80, 140, 255, 0.32), transparent 28rem),
    radial-gradient(circle at 86% 18%, rgba(20, 184, 166, 0.22), transparent 26rem),
    linear-gradient(135deg, var(--bg), var(--bg-2));
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  line-height: 1.5;
  transition: background 0.2s ease, color 0.2s ease;
}

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

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

button {
  color: inherit;
}

.topbar,
.admin-topbar {
  align-items: center;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  display: flex;
  justify-content: space-between;
  padding: 14px clamp(18px, 4vw, 48px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar h1,
.admin-topbar h1 {
  font-size: 18px;
  margin: 2px 0 0;
}

.topbar .eyebrow {
  font-size: 20px;
  line-height: 1.15;
}

.topbar h1 {
  font-size: 17px;
  line-height: 1.25;
}

.brand-lockup,
.top-actions,
.admin-topbar nav {
  align-items: center;
  display: flex;
  gap: 12px;
}

.brand-symbol,
.brand-mark {
  align-items: center;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: 12px;
  box-shadow: 0 10px 26px rgba(37, 99, 235, 0.25);
  color: #ffffff;
  display: inline-flex;
  font-size: 18px;
  font-weight: 800;
  height: 38px;
  justify-content: center;
  min-width: 38px;
  padding: 0 9px;
}

.brand-image {
  overflow: hidden;
  padding: 0;
}

.brand-image img {
  display: block;
  height: 100%;
  object-fit: contain;
  width: 100%;
}

.brand-symbol.brand-image {
  min-width: 92px;
  width: 120px;
}

.brand-mark.brand-image {
  height: 74px;
  width: 174px;
}

.eyebrow {
  color: var(--primary);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  margin: 0;
  text-transform: uppercase;
}

.admin-entry,
.admin-topbar nav a,
.muted-link,
.secondary-btn,
.theme-toggle {
  color: var(--muted);
  font-size: 14px;
}

.admin-entry,
.admin-topbar nav a,
.secondary-btn,
.theme-toggle {
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: var(--soft-shadow);
  cursor: pointer;
  display: inline-flex;
  font-weight: 650;
  gap: 8px;
  min-height: 38px;
  padding: 0 14px;
}

.admin-entry:hover,
.admin-topbar nav a:hover,
.secondary-btn:hover,
.theme-toggle:hover {
  border-color: var(--line-strong);
  color: var(--primary-dark);
}

.theme-toggle-icon {
  background: var(--primary);
  border-radius: 50%;
  display: inline-block;
  height: 14px;
  position: relative;
  width: 14px;
}

:root[data-theme="dark"] .theme-toggle-icon {
  background: transparent;
  box-shadow: inset -5px -2px 0 1px var(--primary);
}

.shell,
.admin-shell {
  margin: 0 auto;
  max-width: 1240px;
  padding: 26px 18px 42px;
}

.workspace-head {
  align-items: flex-end;
  display: flex;
  justify-content: space-between;
  margin: 8px 0 18px;
}

.workspace-head h2 {
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.12;
  margin: 8px 0;
}

.workspace-head p:last-child,
.section-heading p,
.category-manager-head p,
.link-row-main p,
.updated-at,
.workspace-meta span,
.stats-row span {
  color: var(--muted);
}

.workspace-head p:last-child,
.section-heading p,
.category-manager-head p,
.link-row-main p {
  margin: 4px 0 0;
}

.workspace-meta {
  display: flex;
  gap: 10px;
}

.workspace-meta div,
.stats-row div,
.command-bar,
.side-panel,
.nav-card,
.auth-card,
.panel,
.category-manager {
  background: var(--surface);
  border: 1px solid var(--line);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  box-shadow: var(--soft-shadow);
}

.workspace-meta div {
  border-radius: 14px;
  min-width: 92px;
  padding: 12px 14px;
}

.workspace-meta strong,
.workspace-meta span,
.stats-row strong,
.stats-row span {
  display: block;
}

.workspace-meta strong {
  font-size: 22px;
}

.command-bar {
  align-items: center;
  border-radius: 16px;
  display: flex;
  gap: 16px;
  justify-content: space-between;
  margin-bottom: 18px;
  padding: 12px;
}

.search-wrap {
  align-items: center;
  display: flex;
  flex: 1;
  gap: 10px;
  min-width: 0;
}

.search-wrap label {
  height: 1px;
  margin: 0;
  overflow: hidden;
  position: absolute;
  width: 1px;
}

.search-icon {
  align-items: center;
  background: var(--surface-soft);
  border-radius: 12px;
  color: var(--primary-dark);
  display: inline-flex;
  flex: 0 0 40px;
  height: 40px;
  justify-content: center;
  position: relative;
}

.search-icon::before {
  border: 2px solid var(--primary);
  border-radius: 50%;
  content: "";
  height: 10px;
  width: 10px;
}

.search-icon::after {
  background: var(--primary);
  border-radius: 999px;
  content: "";
  height: 2px;
  position: absolute;
  transform: translate(7px, 7px) rotate(45deg);
  width: 8px;
}

.updated-at {
  flex: 0 0 auto;
  font-size: 13px;
}

label span,
.search-wrap label {
  color: var(--muted);
  display: block;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 8px;
}

input,
select,
textarea {
  background: var(--surface-strong);
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--text);
  min-height: 42px;
  outline: none;
  padding: 10px 12px;
  width: 100%;
}

textarea {
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.14);
}

.search-wrap input {
  background: transparent;
  border: 0;
  min-height: 42px;
  padding: 8px 4px;
}

.search-wrap input:focus {
  box-shadow: none;
}

.content-layout {
  align-items: start;
  display: grid;
  gap: 18px;
  grid-template-columns: 250px minmax(0, 1fr);
}

.side-panel {
  border-radius: 18px;
  padding: 10px;
  position: sticky;
  top: 88px;
}

.category-tabs {
  display: grid;
  gap: 8px;
  margin: 0;
}

.tab {
  align-items: center;
  background: transparent;
  border: 0;
  border-radius: 14px;
  color: var(--text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  min-height: 40px;
  padding: 10px 12px;
  text-align: left;
}

.tab span {
  font-weight: 650;
}

.tab em {
  background: var(--surface-soft);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
  font-style: normal;
  min-width: 28px;
  padding: 2px 8px;
  text-align: center;
}

.tab.is-active {
  background: rgba(37, 99, 235, 0.14);
  color: var(--primary-dark);
}

.tab.is-active em {
  background: rgba(37, 99, 235, 0.18);
  color: var(--primary-dark);
}

.parent-tab {
  margin-top: 8px;
}

.parent-tab span {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0;
}

.child-tab {
  margin-left: 14px;
  min-height: 36px;
  padding-left: 14px;
}

.child-tab span {
  color: var(--muted);
  font-size: 15px;
}

.child-tab.is-active span {
  color: var(--primary-dark);
}

.main-panel {
  min-width: 0;
}

.parent-section + .parent-section {
  margin-top: 32px;
}

.parent-heading {
  border-bottom: 1px solid var(--line);
  margin-bottom: 22px;
  padding-bottom: 14px;
}

.parent-heading .eyebrow {
  color: var(--primary-dark);
  font-size: 28px;
  font-weight: 850;
  line-height: 1.2;
  text-transform: none;
}

.parent-heading p:last-child {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.6;
  margin: 8px 0 0;
}

.category-section {
  margin-top: 0;
}

.category-section + .category-section {
  margin-top: 26px;
}

.section-heading {
  align-items: end;
  display: flex;
  justify-content: space-between;
  margin-bottom: 12px;
}

.section-heading h2,
.section-heading h3,
.panel-heading h2,
.category-manager h3 {
  font-size: 21px;
  margin: 0;
}

.section-heading p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
  margin-top: 5px;
}

.link-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.nav-card {
  align-items: flex-start;
  border-radius: 18px;
  display: flex;
  gap: 12px;
  min-height: 112px;
  padding: 16px;
  transition: transform 0.14s ease, box-shadow 0.14s ease, border-color 0.14s ease;
}

.nav-card:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.card-icon {
  align-items: center;
  background: rgba(37, 99, 235, 0.12);
  border: 1px solid rgba(37, 99, 235, 0.2);
  border-radius: 12px;
  color: var(--primary-dark);
  display: inline-flex;
  flex: 0 0 44px;
  font-size: 14px;
  font-weight: 800;
  height: 44px;
  justify-content: center;
  overflow: hidden;
  padding: 0 6px;
  text-align: center;
}

.icon-image img {
  border-radius: 9px;
  display: block;
  height: 28px;
  object-fit: contain;
  width: 28px;
}

.icon-favicon.is-broken {
  display: none;
}

.card-body {
  min-width: 0;
}

.card-body strong,
.card-body small,
.card-body em {
  display: block;
}

.card-body strong {
  font-size: 16px;
  line-height: 1.35;
  margin-bottom: 6px;
}

.card-body small {
  color: var(--muted);
  display: -webkit-box;
  min-height: 40px;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.card-body em {
  color: var(--accent);
  font-size: 12px;
  font-style: normal;
  margin-top: 7px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.empty-state,
.empty-inline,
.site-footer {
  color: var(--muted);
  padding: 22px 0;
  text-align: center;
}

.auth-shell {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 20px;
  position: relative;
}

.auth-theme-toggle {
  position: absolute;
  right: 24px;
  top: 24px;
}

.auth-card {
  border-radius: 22px;
  max-width: 420px;
  padding: 30px;
  width: 100%;
}

.auth-card h1 {
  margin: 18px 0 6px;
}

.auth-card p {
  color: var(--muted);
  margin: 0 0 22px;
}

.auth-card label {
  display: block;
  margin-bottom: 14px;
}

.primary-btn {
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  border: 0;
  border-radius: 12px;
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.2);
  color: #ffffff;
  cursor: pointer;
  font-weight: 750;
  min-height: 42px;
  padding: 0 16px;
}

.primary-btn:hover {
  filter: brightness(1.04);
}

.auth-card .primary-btn {
  width: 100%;
}

.muted-link {
  display: block;
  margin-top: 16px;
  text-align: center;
}

.alert {
  border: 1px solid var(--line);
  border-radius: 14px;
  margin-bottom: 18px;
  padding: 12px 14px;
}

.alert-success {
  background: var(--success-bg);
  color: var(--success-text);
}

.alert-error {
  background: var(--error-bg);
  color: var(--error-text);
}

.stats-row {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, 1fr);
  margin-bottom: 18px;
}

.stats-row div {
  border-radius: 18px;
  padding: 18px;
}

.stats-row strong {
  font-size: 28px;
}

.panel,
.category-manager {
  border-radius: 20px;
  padding: 18px;
}

.panel + .panel,
.category-create-panel,
.managed-categories {
  margin-top: 18px;
}

.panel-heading {
  align-items: center;
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  margin: -2px 0 18px;
  padding-bottom: 14px;
}

.panel-heading a {
  color: var(--primary-dark);
  font-size: 14px;
  font-weight: 700;
}

.panel-summary {
  align-items: center;
  cursor: pointer;
  display: flex;
  gap: 12px;
  justify-content: flex-start;
  list-style: none;
}

.panel-summary::-webkit-details-marker {
  display: none;
}

.panel-summary span {
  font-size: 18px;
  font-weight: 800;
}

.panel-summary::before {
  border-bottom: 2px solid var(--primary-dark);
  border-right: 2px solid var(--primary-dark);
  content: "";
  flex: 0 0 9px;
  height: 9px;
  transform: rotate(-45deg);
  transition: transform 0.16s ease;
  width: 9px;
}

.settings-panel[open] > .panel-summary::before,
.password-panel[open] > .panel-summary::before,
.category-create-panel[open] > .panel-summary::before {
  transform: rotate(45deg);
}

.panel-summary em {
  color: var(--muted);
  margin-left: auto;
  font-size: 13px;
  font-style: normal;
}

.settings-panel[open] .panel-summary,
.password-panel[open] .panel-summary,
.category-create-panel[open] .panel-summary {
  border-bottom: 1px solid var(--line);
  margin-bottom: 18px;
  padding-bottom: 14px;
}

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

.form-grid .full {
  grid-column: 1 / -1;
}

.compact-form {
  align-items: end;
  margin-top: 14px;
}

.check-row {
  align-items: center;
  display: flex;
  gap: 8px;
}

.check-row input {
  min-height: auto;
  width: auto;
}

.check-row span {
  margin: 0;
}

.admin-section-heading {
  margin: 8px 0 14px;
}

.category-manager + .category-manager {
  margin-top: 16px;
}

.parent-manager {
  background: linear-gradient(135deg, rgba(110, 168, 255, 0.14), rgba(94, 234, 212, 0.07)), var(--surface);
  border-color: rgba(110, 168, 255, 0.3);
}

.category-manager-head {
  align-items: flex-start;
  border-bottom: 1px solid rgba(110, 168, 255, 0.28);
  display: grid;
  gap: 16px;
  grid-template-columns: minmax(0, 1fr) auto;
  padding-bottom: 14px;
}

.category-manager-head h3 {
  color: var(--primary-dark);
  font-size: 24px;
}

.collapsible-summary {
  cursor: pointer;
  list-style: none;
}

.collapsible-summary::-webkit-details-marker,
.category-editor summary::-webkit-details-marker,
.link-editor summary::-webkit-details-marker {
  display: none;
}

.summary-title {
  align-items: flex-start;
  display: flex;
  gap: 10px;
  min-width: 0;
}

.collapse-icon {
  border-bottom: 2px solid var(--primary-dark);
  border-right: 2px solid var(--primary-dark);
  display: inline-block;
  flex: 0 0 9px;
  height: 9px;
  margin-top: 7px;
  transform: rotate(-45deg);
  transition: transform 0.16s ease;
  width: 9px;
}

details[open] > summary .collapse-icon {
  transform: rotate(45deg);
}

.category-title-line,
.manager-actions,
.link-row-title,
.link-row-meta {
  align-items: center;
  display: flex;
  gap: 10px;
}

.category-title-line,
.link-row-title {
  flex-wrap: wrap;
}

.manager-actions,
.link-row-meta {
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
  max-width: 560px;
}

.manager-actions span,
.link-row-meta span {
  color: var(--muted);
  font-size: 13px;
}

.manager-actions a,
.link-row-meta a,
.inline-toggle {
  color: var(--primary-dark);
  font-size: 14px;
  font-weight: 700;
}

.manager-actions button,
.link-row-meta button,
.actions button {
  background: transparent;
  border: 0;
  color: var(--danger);
  cursor: pointer;
  font-size: 14px;
  font-weight: 700;
  padding: 0;
}

.inline-toggle {
  background: rgba(37, 99, 235, 0.12) !important;
  border: 1px solid rgba(37, 99, 235, 0.18) !important;
  border-radius: 999px !important;
  color: var(--primary-dark) !important;
  min-height: 30px;
  padding: 0 10px !important;
}

.drag-handle {
  align-items: center;
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--muted);
  cursor: grab;
  display: inline-flex;
  flex: 0 0 28px;
  font-size: 18px;
  font-weight: 800;
  height: 28px;
  justify-content: center;
  line-height: 1;
  margin-top: -2px;
  user-select: none;
}

.drag-handle:active {
  cursor: grabbing;
}

.sortable-item.is-dragging {
  opacity: 0.56;
  outline: 2px solid rgba(37, 99, 235, 0.35);
}

.category-editor,
.link-editor {
  border-bottom: 1px solid var(--line);
  padding: 14px 0;
}

.category-editor summary,
.link-editor summary {
  align-items: center;
  color: var(--primary-dark);
  cursor: pointer;
  display: inline-flex;
  gap: 8px;
  font-weight: 800;
}

.child-category-list {
  display: grid;
  gap: 14px;
  padding-top: 16px;
}

.child-category-card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(94, 234, 212, 0.24);
  border-radius: 18px;
  padding: 16px;
}

:root[data-theme="light"] .child-category-card {
  background: rgba(255, 255, 255, 0.58);
}

.child-category-head {
  align-items: flex-start;
  display: grid;
  gap: 14px;
  grid-template-columns: minmax(0, 1fr) auto;
}

.child-category-head h4 {
  color: var(--accent);
  font-size: 20px;
  margin: 0;
}

.child-category-head p {
  color: var(--muted);
  margin: 4px 0 0;
}

.level-badge {
  background: rgba(37, 99, 235, 0.12);
  border: 1px solid rgba(37, 99, 235, 0.2);
  border-radius: 999px;
  color: var(--primary-dark);
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  padding: 3px 8px;
}

.link-list {
  display: grid;
  gap: 10px;
  padding-top: 14px;
}

.link-row {
  align-items: start;
  background: rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(212, 225, 255, 0.14);
  border-left: 3px solid rgba(94, 234, 212, 0.52);
  border-radius: 16px;
  display: grid;
  gap: 14px;
  grid-template-columns: 28px minmax(0, 1fr) minmax(150px, auto);
  padding: 16px;
}

:root[data-theme="light"] .link-row {
  background: rgba(255, 255, 255, 0.68);
  border-color: rgba(120, 144, 180, 0.22);
  border-left-color: rgba(15, 118, 110, 0.45);
}

.link-row-main {
  grid-column: 2;
  min-width: 0;
}

.link-row .card-icon {
  display: none;
}

.link-row-main p {
  max-width: 72ch;
  overflow-wrap: anywhere;
  word-break: normal;
}

.link-row-main a {
  color: var(--accent);
  display: block;
  font-size: 13px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.link-row-title strong {
  line-height: 1.35;
}

.link-row-meta {
  align-content: start;
  grid-column: 3;
  white-space: nowrap;
}

.status {
  border-radius: 999px;
  display: inline-block;
  font-size: 12px;
  padding: 4px 9px;
}

.status.on {
  background: var(--success-bg);
  color: var(--success-text);
}

.status.off {
  background: var(--surface-soft);
  color: var(--muted);
}

@media (max-width: 900px) {
  .content-layout {
    grid-template-columns: 1fr;
  }

  .side-panel {
    position: static;
  }

  .category-tabs {
    display: flex;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .tab {
    flex: 0 0 auto;
    gap: 10px;
    min-width: 118px;
  }

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

  .category-manager-head,
  .child-category-head {
    grid-template-columns: 1fr;
  }

  .link-row {
    grid-template-columns: 28px minmax(0, 1fr);
  }

  .manager-actions {
    justify-content: flex-start;
    max-width: none;
  }

  .link-row-meta {
    grid-column: 2;
    justify-content: flex-start;
    max-width: none;
    white-space: normal;
  }
}

@media (max-width: 640px) {
  .topbar,
  .admin-topbar,
  .workspace-head,
  .command-bar,
  .section-heading,
  .category-manager-head,
  .child-category-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .top-actions,
  .admin-topbar nav {
    flex-wrap: wrap;
  }

  .topbar {
    position: static;
  }

  .topbar h1,
  .admin-topbar h1 {
    font-size: 17px;
  }

  .workspace-meta {
    width: 100%;
  }

  .workspace-meta div {
    flex: 1;
  }

  .updated-at {
    flex: auto;
  }

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

  .form-grid .full {
    grid-column: auto;
  }

  .nav-card {
    min-height: auto;
  }

  .link-row {
    grid-template-columns: 28px minmax(0, 1fr);
  }

  .manager-actions,
  .link-row-meta {
    width: 100%;
  }

  .link-row-meta {
    grid-column: 1 / -1;
    justify-content: flex-start;
  }
}