/* ===== StackVault — MD3 Design System ===== */

:root {
  --md-primary: #006B5E;
  --md-primary-container: #C4E7E0;
  --md-on-primary: #FFFFFF;
  --md-secondary: #006877;
  --md-secondary-container: #B1EAF3;
  --md-surface: #FEFBFA;
  --md-surface-dim: #DDDAD9;
  --md-surface-container: #F3F0EF;
  --md-surface-container-high: #EDEAE9;
  --md-surface-container-highest: #E4E1E0;
  --md-on-surface: #1B1B1B;
  --md-on-surface-variant: #444746;
  --md-outline-variant: #C4C7C5;
  --md-outline: #747775;
  --md-error: #BA1A1A;
  --md-error-container: #FFE0E0;

  --md-elevation-1: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.08);
  --md-elevation-2: 0 4px 8px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.06);
  --md-elevation-3: 0 8px 16px rgba(0,0,0,0.08), 0 4px 8px rgba(0,0,0,0.06);
  --md-radius-sm: 8px;
  --md-radius-md: 12px;
  --md-radius-lg: 16px;
  --md-radius-xl: 28px;
}

[data-dark] {
  --md-primary: #4CDAC6;
  --md-primary-container: #005047;
  --md-on-primary: #003731;
  --md-secondary: #4DD8EB;
  --md-secondary-container: #004E58;
  --md-surface: #141414;
  --md-surface-dim: #1C1B1B;
  --md-surface-container: #2C2B2B;
  --md-surface-container-high: #363535;
  --md-surface-container-highest: #414040;
  --md-on-surface: #E4E2E0;
  --md-on-surface-variant: #C5C6C5;
  --md-outline-variant: #444746;
  --md-outline: #8E918F;
  --md-error: #FFB4AB;
  --md-error-container: #93000A;

  --md-elevation-1: 0 1px 3px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.3);
  --md-elevation-2: 0 4px 8px rgba(0,0,0,0.4), 0 2px 4px rgba(0,0,0,0.3);
  --md-elevation-3: 0 8px 16px rgba(0,0,0,0.4), 0 4px 8px rgba(0,0,0,0.3);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--md-on-surface);
  background: var(--md-surface);
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s, color 0.3s;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

/* ===== App Bar ===== */
.app-bar {
  background: color-mix(in srgb, var(--md-surface-container) 85%, transparent);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--md-outline-variant);
}

.app-bar-content {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1rem;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--md-primary);
  letter-spacing: -0.02em;
}

.app-bar nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-user {
  font-size: 0.8125rem;
  color: var(--md-on-surface-variant);
  font-weight: 500;
}

/* ===== Buttons ===== */
.btn-filled {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 1.25rem;
  border-radius: var(--md-radius-xl);
  background: var(--md-primary);
  color: var(--md-on-primary);
  font-size: 0.8125rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: box-shadow 0.2s, transform 0.1s, background 0.2s;
  text-decoration: none;
  white-space: nowrap;
}

.btn-filled:hover {
  box-shadow: var(--md-elevation-2);
}

.btn-filled:active {
  transform: scale(0.97);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 1.25rem;
  border-radius: var(--md-radius-xl);
  background: transparent;
  color: var(--md-primary);
  font-size: 0.8125rem;
  font-weight: 600;
  border: 1px solid var(--md-outline);
  cursor: pointer;
  transition: background 0.2s;
}

.btn-outline:hover {
  background: var(--md-primary-container);
}

.btn-text {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  border-radius: var(--md-radius-xl);
  color: var(--md-primary);
  font-size: 0.8125rem;
  font-weight: 600;
  border: none;
  background: transparent;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}

.btn-text:hover {
  background: var(--md-surface-container-highest);
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  border-radius: var(--md-radius-xl);
  cursor: pointer;
  font-size: 1.125rem;
  transition: background 0.2s;
}

.btn-icon:hover {
  background: var(--md-surface-container-highest);
}

.btn-sm {
  padding: 0.375rem 0.875rem;
  font-size: 0.75rem;
}

/* ===== Hero ===== */
.hero {
  text-align: center;
  padding: 3rem 1rem 1.5rem;
  max-width: 640px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
  color: var(--md-on-surface);
}

.hero p {
  color: var(--md-on-surface-variant);
  font-size: 1.0625rem;
}

/* ===== Tag Bar ===== */
.tag-bar {
  display: flex;
  gap: 0.5rem;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1rem 1.25rem;
  flex-wrap: wrap;
}

.tag-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.375rem 0.875rem;
  border-radius: var(--md-radius-xl);
  background: var(--md-surface-container);
  color: var(--md-on-surface-variant);
  font-size: 0.8125rem;
  font-weight: 500;
  border: 1px solid var(--md-outline-variant);
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  text-decoration: none;
}

.tag-chip:hover {
  background: var(--md-surface-container-highest);
}

.tag-active {
  background: var(--md-primary-container);
  color: var(--md-primary);
  border-color: var(--md-primary);
  font-weight: 600;
}

.tag-sm {
  padding: 0.1875rem 0.625rem;
  font-size: 0.75rem;
}

.card-tags {
  display: flex;
  gap: 0.375rem;
  flex-wrap: wrap;
  padding: 0.75rem 0 0;
}

/* ===== Toolbar ===== */
.toolbar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1rem 1.5rem;
}

.search-field {
  position: relative;
  flex: 1;
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--md-on-surface-variant);
  pointer-events: none;
}

.search-field input {
  width: 100%;
  padding: 0.625rem 0.875rem 0.625rem 2.375rem;
  border-radius: var(--md-radius-xl);
  border: 1px solid var(--md-outline-variant);
  background: var(--md-surface-container);
  color: var(--md-on-surface);
  font-size: 0.9375rem;
  font-family: inherit;
  transition: border-color 0.2s, background 0.2s;
}

.search-field input:focus {
  outline: none;
  border-color: var(--md-primary);
  background: var(--md-surface);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--md-primary) 15%, transparent);
}

.search-field input::placeholder {
  color: var(--md-outline);
}

#sortSelect {
  padding: 0.625rem 1rem;
  border-radius: var(--md-radius-xl);
  border: 1px solid var(--md-outline-variant);
  background: var(--md-surface-container);
  color: var(--md-on-surface);
  font-size: 0.8125rem;
  font-family: inherit;
  cursor: pointer;
  transition: border-color 0.2s;
  appearance: auto;
}

#sortSelect:focus {
  outline: none;
  border-color: var(--md-primary);
}

/* ===== Collection Grid ===== */
.collections-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1rem 3rem;
}

/* ===== Card ===== */
.card {
  background: var(--md-surface-container);
  border-radius: var(--md-radius-md);
  padding: 1.25rem;
  transition: box-shadow 0.2s, transform 0.2s;
  box-shadow: var(--md-elevation-1);
  border: 1px solid var(--md-outline-variant);
}

.card:hover {
  box-shadow: var(--md-elevation-2);
  transform: translateY(-2px);
}

.collection-card {
  display: flex;
  flex-direction: column;
  color: inherit;
}

.card-thumb {
  width: calc(100% + 2.5rem);
  height: 120px;
  margin: -1.25rem -1.25rem 0.75rem;
  border-radius: var(--md-radius-md) var(--md-radius-md) 0 0;
  background-size: cover;
  background-position: center;
  background-color: var(--md-surface-container-high);
}

.card-body-link {
  text-decoration: none;
  color: inherit;
  display: block;
}

.card-body-link:hover h2 {
  color: var(--md-primary);
}

.card-top {
  display: flex;
  justify-content: flex-start;
  margin-bottom: 0.75rem;
}

.card-body h2 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.375rem;
  color: var(--md-on-surface);
  transition: color 0.2s;
}

.card-body p {
  font-size: 0.875rem;
  color: var(--md-on-surface-variant);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-footer {
  margin-top: auto;
  padding-top: 0.75rem;
}

.card-footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-footer .date {
  font-size: 0.75rem;
  color: var(--md-outline);
}

/* ===== Collection Header ===== */
.collection-header {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1rem 1.5rem;
  text-align: center;
}

.back-link {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--md-primary);
  margin-bottom: 1rem;
}

.collection-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.collection-desc {
  color: var(--md-on-surface-variant);
  font-size: 1rem;
  margin-bottom: 1rem;
}

.collection-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.collection-tags {
  display: flex;
  gap: 0.375rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 1rem;
}

/* ===== Tab Bar ===== */
.tab-bar {
  display: flex;
  gap: 0;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1rem 1rem;
}

.tab {
  padding: 0.5rem 1.25rem;
  border-radius: var(--md-radius-xl) var(--md-radius-xl) 0 0;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--md-on-surface-variant);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.tab:hover {
  color: var(--md-on-surface);
}

.tab-active {
  color: var(--md-primary);
  border-bottom-color: var(--md-primary);
}

/* ===== Feed Section ===== */
/* ===== Collection Actions ===== */
.collection-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 1rem;
}

/* ===== Chip ===== */
.chip-score {
  background: color-mix(in srgb, var(--md-primary) 12%, transparent);
  color: var(--md-primary);
}

/* ===== Profile ===== */
.profile-header {
  text-align: center;
  padding: 2.5rem 1rem 2rem;
}

.profile-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--md-primary-container);
  color: var(--md-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto 1rem;
}

.profile-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.profile-stats {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-bottom: 1rem;
  font-size: 0.875rem;
  color: var(--md-on-surface-variant);
}

.profile-stats strong {
  color: var(--md-on-surface);
  font-weight: 700;
}

.profile-sub {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1rem 1rem;
}

.profile-sub h2 {
  font-size: 1.125rem;
  font-weight: 600;
}

/* ===== Embed Preview ===== */
.embed-preview {
  background: var(--md-surface-container);
  border-radius: var(--md-radius-md);
  border: 1px solid var(--md-outline-variant);
  overflow: hidden;
  margin-bottom: 1.5rem;
}

/* ===== Chip ===== */
.chip {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: var(--md-radius-xl);
  background: var(--md-secondary-container);
  color: var(--md-secondary);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.chip-outline {
  background: transparent;
  border: 1px solid var(--md-outline-variant);
  color: var(--md-on-surface-variant);
}

/* ===== Empty State ===== */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 3rem 1rem;
  color: var(--md-on-surface-variant);
}

.empty-state p {
  margin-bottom: 1rem;
}

/* ===== Votes ===== */
.vote-group {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.vote-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  background: transparent;
  border-radius: var(--md-radius-sm);
  cursor: pointer;
  color: var(--md-on-surface-variant);
  font-size: 0.75rem;
  line-height: 1;
  padding: 0;
  transition: background 0.15s, color 0.15s;
}

.vote-btn:hover {
  background: var(--md-surface-container-highest);
}

.vote-up:hover, .vote-up.voted { color: var(--md-primary); }
.vote-down:hover, .vote-down.voted { color: var(--md-error); }

.vote-count {
  font-size: 0.8125rem;
  font-weight: 700;
  min-width: 1.5rem;
  text-align: center;
  color: var(--md-on-surface);
}

.vote-count-lg {
  font-size: 1rem;
}

/* ===== Links List ===== */
.links-list {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.link-card {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
  padding: 1rem 1.25rem;
}

.link-broken {
  opacity: 0.5;
}

.link-favicon {
  width: 20px;
  height: 20px;
  min-width: 20px;
  border-radius: 4px;
  margin-top: 2px;
}

.link-body {
  flex: 1;
  min-width: 0;
}

.link-body h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.link-desc {
  font-size: 0.8125rem;
  color: var(--md-on-surface-variant);
  margin-bottom: 0.375rem;
  line-height: 1.4;
}

.link-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.link-url {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.8125rem;
  color: var(--md-primary);
  font-weight: 500;
}

.link-url svg {
  opacity: 0.7;
}

.link-url:hover svg {
  opacity: 1;
}

.report-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.875rem;
  color: var(--md-outline);
  padding: 2px 4px;
  border-radius: 4px;
  transition: color 0.2s, background 0.2s;
}

.report-btn:hover {
  color: var(--md-error);
  background: var(--md-error-container);
}

.broken-badge {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--md-error);
  background: var(--md-error-container);
  padding: 1px 6px;
  border-radius: 4px;
}

/* ===== Comments ===== */
.comments-section {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

.comments-section h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.comment-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.comment-form textarea {
  width: 100%;
  padding: 0.75rem;
  border-radius: var(--md-radius-sm);
  border: 1px solid var(--md-outline-variant);
  background: var(--md-surface-container);
  color: var(--md-on-surface);
  font-size: 0.9375rem;
  font-family: inherit;
  resize: vertical;
  transition: border-color 0.2s;
}

.comment-form textarea:focus {
  outline: none;
  border-color: var(--md-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--md-primary) 15%, transparent);
}

.comment-form button {
  align-self: flex-end;
}

.comment-login-prompt {
  font-size: 0.875rem;
  color: var(--md-on-surface-variant);
  margin-bottom: 1.5rem;
}

.comments-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.comment {
  background: var(--md-surface-container);
  border-radius: var(--md-radius-sm);
  padding: 0.875rem 1rem;
  border: 1px solid var(--md-outline-variant);
}

.comment-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.375rem;
}

.comment-head strong {
  font-size: 0.875rem;
  font-weight: 600;
}

.comment p {
  font-size: 0.875rem;
  color: var(--md-on-surface-variant);
  line-height: 1.5;
}

/* ===== Tag Picker ===== */
.tag-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag-option {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.75rem;
  border-radius: var(--md-radius-xl);
  border: 1px solid var(--md-outline-variant);
  background: var(--md-surface-container);
  cursor: pointer;
  font-size: 0.8125rem;
  font-weight: 500;
  transition: background 0.2s, border-color 0.2s;
}

.tag-option:has(input:checked) {
  background: var(--md-primary-container);
  border-color: var(--md-primary);
  color: var(--md-primary);
}

.tag-option input {
  display: none;
}

/* ===== Form ===== */
.form-container {
  max-width: 640px;
  margin: 0 auto;
  padding: 2rem 1rem 3rem;
}

.form-container h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.form-container h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 1.5rem 0 0.75rem;
  color: var(--md-on-surface-variant);
}

.field {
  margin-bottom: 1rem;
}

.field label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--md-on-surface-variant);
  margin-bottom: 0.25rem;
}

.field input,
.field textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border-radius: var(--md-radius-sm);
  border: 1px solid var(--md-outline-variant);
  background: var(--md-surface);
  color: var(--md-on-surface);
  font-size: 0.9375rem;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--md-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--md-primary) 15%, transparent);
}

.field-row {
  display: flex;
  gap: 0.75rem;
}

.flex-2 { flex: 2; }
.flex-3 { flex: 3; }

.link-fields {
  background: var(--md-surface-container);
  border-radius: var(--md-radius-sm);
  padding: 0.75rem;
  margin-bottom: 0.5rem;
  border: 1px solid var(--md-outline-variant);
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 2rem;
}

.error-banner {
  background: var(--md-error-container);
  color: var(--md-error);
  padding: 0.75rem 1rem;
  border-radius: var(--md-radius-sm);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.success-banner {
  background: var(--md-primary-container);
  color: var(--md-primary);
  padding: 0.75rem 1rem;
  border-radius: var(--md-radius-sm);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

/* ===== Footer ===== */
.footer {
  margin-top: auto;
  text-align: center;
  padding: 1.5rem;
  color: var(--md-on-surface-variant);
  font-size: 0.8125rem;
  border-top: 1px solid var(--md-outline-variant);
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .field-row {
    flex-direction: column;
    gap: 0;
  }

  .hero h1 {
    font-size: 1.5rem;
  }

  .collection-header h1 {
    font-size: 1.375rem;
  }

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

  .toolbar {
    flex-direction: column;
  }

  .toolbar select {
    width: 100%;
  }

  .app-bar nav {
    gap: 0.25rem;
  }
}

/* ===== Accessibility ===== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.375rem;
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
  font-size: 0.8125rem;
  color: var(--md-outline);
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 0.375rem;
  color: var(--md-outline);
}

.breadcrumb a {
  color: var(--md-primary);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb li[aria-current="page"] {
  color: var(--md-on-surface-variant);
}

/* ===== Link Title ===== */
.link-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
  color: var(--md-on-surface);
}

/* ===== Hub Pages ===== */
.hub-header {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem 1rem 0;
}

.hub-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.hub-desc {
  font-size: 0.9375rem;
  color: var(--md-on-surface-variant);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.hub-content {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1rem 1.5rem;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--md-on-surface-variant);
}

.hub-content p {
  margin-bottom: 0.75rem;
}

.hub-meta {
  font-size: 0.8125rem;
  color: var(--md-outline);
  padding: 0.5rem 0;
}

.toolbar-flat {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1rem;
}

.hub-footer {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem 1rem 2rem;
  font-size: 0.875rem;
  color: var(--md-on-surface-variant);
  border-top: 1px solid var(--md-outline-variant);
}

/* ===== Tags Grid ===== */
.tags-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.75rem;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1rem 2rem;
}

.tag-card {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1rem;
  background: var(--md-surface-container);
  border-radius: var(--md-radius-md);
  text-decoration: none;
  transition: background 0.2s;
}

.tag-card:hover {
  background: var(--md-surface-container-high);
}

.tag-card-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--md-on-surface);
}

.tag-card-count {
  font-size: 0.8125rem;
  color: var(--md-outline);
}

/* ===== Stats Grid ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 0.75rem;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1rem 1.5rem;
}

.stat-card {
  text-align: center;
  padding: 1.5rem 1rem;
  background: var(--md-surface-container);
  border-radius: var(--md-radius-md);
}

.stat-value {
  display: block;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--md-primary);
}

.stat-label {
  display: block;
  font-size: 0.8125rem;
  color: var(--md-on-surface-variant);
  margin-top: 0.25rem;
}

.stat-detail {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1rem 1.5rem;
}

.stat-detail h2 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

/* ===== Footer ===== */
.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1rem;
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: var(--md-primary);
  font-size: 0.8125rem;
  text-decoration: none;
}

.footer-links a:hover {
  text-decoration: underline;
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--md-outline);
}

/* ===== Content Page ===== */
.content-page {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1rem 2rem;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--md-on-surface-variant);
}

.content-page h2 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--md-on-surface);
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.content-page p {
  margin-bottom: 0.75rem;
}

.content-page ul {
  margin-bottom: 0.75rem;
  padding-left: 1.25rem;
}

.content-page li {
  margin-bottom: 0.375rem;
}