/* ================================================================
   birl — Bookmark Manager
   Modern dark/light theme CSS
   ================================================================ */

/* --- Reset & Base --- */

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

html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    Oxygen, Ubuntu, Cantarell, 'Helvetica Neue', Arial, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  background-color: var(--bg);
  color: var(--text);
  transition: background-color 0.2s, color 0.2s;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s;
}

a:hover {
  color: var(--accent-hover);
}

img {
  max-width: 100%;
  display: block;
}

/* --- Color Tokens: Light (default) --- */

:root {
  --bg: #fafaf9;
  --bg-elevated: #ffffff;
  --bg-subtle: #f5f5f4;
  --bg-inset: #e7e5e4;
  --border: #e7e5e4;
  --border-subtle: #f0efee;
  --text: #18181b;
  --text-secondary: #52525b;
  --text-muted: #a1a1aa;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-subtle: rgba(99, 102, 241, 0.08);
  --accent-ring: rgba(99, 102, 241, 0.35);
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --danger-subtle: rgba(239, 68, 68, 0.08);
  --success: #22c55e;
  --success-hover: #16a34a;
  --success-subtle: rgba(34, 197, 94, 0.08);
  --warning-bg: #fef3c7;
  --warning-border: #fcd34d;
  --warning-text: #92400e;
  --info-bg: #eff6ff;
  --info-border: #bfdbfe;
  --info-text: #1e40af;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-card-hover: 0 8px 24px rgba(0, 0, 0, 0.1), 0 2px 8px rgba(0, 0, 0, 0.04);
  --navbar-bg: rgba(250, 250, 249, 0.8);
  --navbar-border: #e7e5e4;
  --input-bg: #ffffff;
  --input-border: #d4d4d8;
  --input-focus-border: var(--accent);
  --input-focus-ring: var(--accent-ring);
  --token-bg: #18181b;
  --token-text: #e4e4e7;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
}

/* --- Color Tokens: Light (explicit) --- */

[data-theme="light"] {
  --bg: #fafaf9;
  --bg-elevated: #ffffff;
  --bg-subtle: #f5f5f4;
  --bg-inset: #e7e5e4;
  --border: #e7e5e4;
  --border-subtle: #f0efee;
  --text: #18181b;
  --text-secondary: #52525b;
  --text-muted: #a1a1aa;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-subtle: rgba(99, 102, 241, 0.08);
  --accent-ring: rgba(99, 102, 241, 0.35);
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --danger-subtle: rgba(239, 68, 68, 0.08);
  --success: #22c55e;
  --success-hover: #16a34a;
  --success-subtle: rgba(34, 197, 94, 0.08);
  --warning-bg: #fef3c7;
  --warning-border: #fcd34d;
  --warning-text: #92400e;
  --info-bg: #eff6ff;
  --info-border: #bfdbfe;
  --info-text: #1e40af;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-card-hover: 0 8px 24px rgba(0, 0, 0, 0.1), 0 2px 8px rgba(0, 0, 0, 0.04);
  --navbar-bg: rgba(250, 250, 249, 0.8);
  --navbar-border: #e7e5e4;
  --input-bg: #ffffff;
  --input-border: #d4d4d8;
  --input-focus-border: var(--accent);
  --input-focus-ring: var(--accent-ring);
  --token-bg: #18181b;
  --token-text: #e4e4e7;
}

/* --- Color Tokens: Dark --- */

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #09090b;
    --bg-elevated: #18181b;
    --bg-subtle: #1c1c1f;
    --bg-inset: #27272a;
    --border: #27272a;
    --border-subtle: #1e1e21;
    --text: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --accent: #818cf8;
    --accent-hover: #a5b4fc;
    --accent-subtle: rgba(129, 140, 248, 0.1);
    --accent-ring: rgba(129, 140, 248, 0.3);
    --danger: #f87171;
    --danger-hover: #fca5a5;
    --danger-subtle: rgba(248, 113, 113, 0.1);
    --success: #4ade80;
    --success-hover: #86efac;
    --success-subtle: rgba(74, 222, 128, 0.1);
    --warning-bg: rgba(251, 191, 36, 0.1);
    --warning-border: #92400e;
    --warning-text: #fcd34d;
    --info-bg: rgba(96, 165, 250, 0.1);
    --info-border: #1e3a5f;
    --info-text: #93c5fd;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.4), 0 0 1px rgba(255, 255, 255, 0.05);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.5), 0 0 1px rgba(255, 255, 255, 0.05);
    --shadow-card-hover: 0 0 24px rgba(129, 140, 248, 0.08), 0 0 1px rgba(129, 140, 248, 0.2);
    --navbar-bg: rgba(9, 9, 11, 0.8);
    --navbar-border: #27272a;
    --input-bg: #18181b;
    --input-border: #3f3f46;
    --input-focus-border: var(--accent);
    --input-focus-ring: var(--accent-ring);
    --token-bg: #0a0a0b;
    --token-text: #d4d4d8;
  }
}

[data-theme="dark"] {
  --bg: #09090b;
  --bg-elevated: #18181b;
  --bg-subtle: #1c1c1f;
  --bg-inset: #27272a;
  --border: #27272a;
  --border-subtle: #1e1e21;
  --text: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --accent: #818cf8;
  --accent-hover: #a5b4fc;
  --accent-subtle: rgba(129, 140, 248, 0.1);
  --accent-ring: rgba(129, 140, 248, 0.3);
  --danger: #f87171;
  --danger-hover: #fca5a5;
  --danger-subtle: rgba(248, 113, 113, 0.1);
  --success: #4ade80;
  --success-hover: #86efac;
  --success-subtle: rgba(74, 222, 128, 0.1);
  --warning-bg: rgba(251, 191, 36, 0.1);
  --warning-border: #92400e;
  --warning-text: #fcd34d;
  --info-bg: rgba(96, 165, 250, 0.1);
  --info-border: #1e3a5f;
  --info-text: #93c5fd;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.4), 0 0 1px rgba(255, 255, 255, 0.05);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.5), 0 0 1px rgba(255, 255, 255, 0.05);
  --shadow-card-hover: 0 0 24px rgba(129, 140, 248, 0.08), 0 0 1px rgba(129, 140, 248, 0.2);
  --navbar-bg: rgba(9, 9, 11, 0.8);
  --navbar-border: #27272a;
  --input-bg: #18181b;
  --input-border: #3f3f46;
  --input-focus-border: var(--accent);
  --input-focus-ring: var(--accent-ring);
  --token-bg: #0a0a0b;
  --token-text: #d4d4d8;
}

/* --- Typography --- */

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--text);
  letter-spacing: -0.01em;
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.1rem; }

p {
  color: var(--text-secondary);
}

/* --- Container & Layout --- */

.container {
  width: 100%;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

main {
  flex: 1;
  padding: 32px 0;
}

/* --- Navbar --- */

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--navbar-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--navbar-border);
  transition: background-color 0.2s, border-color 0.2s;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
  height: 56px;
  gap: 16px;
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
  text-decoration: none;
  flex-shrink: 0;
  transition: color 0.15s;
}

.nav-logo {
  width: 24px;
  height: 24px;
  border-radius: 6px;
}

.nav-brand:hover {
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: color 0.15s, background-color 0.15s;
}

.nav-links a:hover {
  color: var(--text);
  background-color: var(--accent-subtle);
}

.nav-user {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: color 0.15s, background-color 0.15s;
}

.nav-user:hover {
  color: var(--text);
  background-color: var(--accent-subtle);
}

/* --- Theme Toggle --- */

.theme-toggle {
  appearance: none;
  border: none;
  background: var(--bg-subtle);
  color: var(--text-muted);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: background-color 0.15s, color 0.15s, transform 0.15s;
}

.theme-toggle:hover {
  background: var(--accent-subtle);
  color: var(--accent);
  transform: scale(1.05);
}

.theme-toggle:active {
  transform: scale(0.95);
}

/* --- Footer --- */

.footer {
  padding: 24px 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  transition: border-color 0.2s;
}

/* --- Flash / Alerts --- */

.flash {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  margin-bottom: 20px;
  background-color: var(--info-bg);
  border: 1px solid var(--info-border);
  color: var(--info-text);
  transition: background-color 0.2s, border-color 0.2s, color 0.2s;
}

.flash-warning {
  background-color: var(--warning-bg);
  border: 1px solid var(--warning-border);
  color: var(--warning-text);
}

/* --- Page Header --- */

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.page-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.page-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

/* --- Search --- */

.search-form {
  display: flex;
  align-items: center;
  gap: 6px;
}

.search-input {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-input);
  color: var(--text);
  font-size: 0.9rem;
  font-family: inherit;
  width: 220px;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.search-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

[data-theme="dark"] .search-input:focus {
  box-shadow: 0 0 0 3px rgba(129, 140, 248, 0.2);
}

/* --- Buttons --- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: 0.875rem;
  font-weight: 500;
  font-family: inherit;
  line-height: 1.4;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.15s, color 0.15s, border-color 0.15s,
    box-shadow 0.15s, transform 0.1s;
  text-decoration: none;
}

.btn:active {
  transform: scale(0.98);
}

.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.btn-primary {
  background-color: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #ffffff;
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
}

.btn-secondary:hover {
  background-color: var(--bg-subtle);
  color: var(--text);
  border-color: var(--input-border);
}

.btn-danger {
  background-color: var(--danger);
  color: #ffffff;
  border-color: var(--danger);
}

.btn-danger:hover {
  background-color: var(--danger-hover);
  border-color: var(--danger-hover);
  color: #ffffff;
}

.btn-sm {
  padding: 4px 10px;
  font-size: 0.8rem;
}

.btn-lg {
  padding: 12px 24px;
  font-size: 1rem;
}

.btn-public {
  background-color: var(--success);
  color: #ffffff;
  border-color: var(--success);
}

.btn-public:hover {
  background-color: var(--success-hover);
  border-color: var(--success-hover);
  color: #ffffff;
}

.btn-private {
  background-color: var(--bg-subtle);
  color: var(--text-muted);
  border-color: var(--border);
}

.btn-private:hover {
  background-color: var(--bg-inset);
  color: var(--text-secondary);
}

.btn-icon {
  padding: 0;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--bg-subtle);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.btn-icon:hover {
  background: var(--accent-subtle);
  color: var(--accent);
  border-color: var(--accent-ring);
}

/* --- Cards --- */

.card {
  background-color: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: background-color 0.2s, border-color 0.2s, box-shadow 0.2s,
    transform 0.2s;
}

.card h2 {
  margin-bottom: 16px;
  font-size: 1.2rem;
}

/* --- Bookmark List & Cards --- */

.bookmark-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.bookmark-card {
  background-color: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: background-color 0.2s, border-color 0.2s, box-shadow 0.2s,
    transform 0.2s;
}

.bookmark-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-1px);
  border-color: var(--input-border);
}

.bookmark-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.bookmark-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  line-height: 1.4;
  transition: color 0.15s;
  word-break: break-word;
}

.bookmark-title:hover {
  color: var(--accent);
}

.bookmark-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 12px;
  word-break: break-word;
}

.bookmark-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.bookmark-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
  transition: border-color 0.2s;
}

/* --- Badges --- */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  white-space: nowrap;
  transition: background-color 0.15s, color 0.15s, border-color 0.15s;
}

.badge-category {
  background-color: var(--accent-subtle);
  color: var(--accent);
  border: 1px solid transparent;
}

a.badge {
  text-decoration: none;
  transition: filter 0.15s, transform 0.15s;
  cursor: pointer;
}

a.badge:hover {
  filter: brightness(0.9);
  transform: translateY(-1px);
  text-decoration: none;
}

.badge-tag {
  background-color: var(--bg-subtle);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.badge-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.visibility-badge {
  padding: 3px 10px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.badge-public {
  background-color: var(--success-subtle);
  color: var(--success);
}

.badge-private {
  background-color: var(--bg-subtle);
  color: var(--text-muted);
}

/* --- Forms --- */

.form {
  max-width: 560px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 6px;
}

.form-group .hint {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.form-group input[type="text"],
.form-group input[type="url"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group textarea {
  display: block;
  width: 100%;
  padding: 10px 12px;
  font-size: 0.9rem;
  font-family: inherit;
  line-height: 1.5;
  color: var(--text);
  background-color: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-sm);
  transition: border-color 0.15s, box-shadow 0.15s, background-color 0.2s;
  outline: none;
}

.form-group input[type="text"]:focus,
.form-group input[type="url"]:focus,
.form-group input[type="email"]:focus,
.form-group input[type="password"]:focus,
.form-group textarea:focus {
  border-color: var(--input-focus-border);
  box-shadow: 0 0 0 3px var(--input-focus-ring);
}

.form-group input[type="text"]::placeholder,
.form-group input[type="url"]::placeholder,
.form-group input[type="email"]::placeholder,
.form-group input[type="password"]::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-group textarea {
  min-height: 100px;
  resize: vertical;
}

.form-check {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}

.form-check label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
  user-select: none;
}

.form-check input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  border-radius: 4px;
  cursor: pointer;
  flex-shrink: 0;
}

.form-inline {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.form-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 8px;
  flex-wrap: wrap;
}

.inline-form {
  display: inline;
}

/* --- Detail Views --- */

.detail-card {
  background-color: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: background-color 0.2s, border-color 0.2s;
}

.detail-row {
  display: flex;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
  gap: 16px;
  align-items: baseline;
  transition: border-color 0.2s;
}

.detail-row:last-child {
  border-bottom: none;
}

.detail-label {
  flex-shrink: 0;
  width: 140px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 20px;
  transition: color 0.15s;
}

.back-link:hover {
  color: var(--accent);
}

/* --- Tables --- */

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.table th,
.table td {
  padding: 12px 16px;
  text-align: left;
}

.table thead th {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-bottom: 2px solid var(--border);
  background-color: var(--bg-subtle);
}

.table tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background-color 0.1s, border-color 0.2s;
}

.table tbody tr:last-child {
  border-bottom: none;
}

.table tbody tr:hover {
  background-color: var(--bg-subtle);
}

.table td {
  color: var(--text-secondary);
}

/* --- Token Display --- */

.token-display {
  font-family: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', monospace;
  font-size: 0.85rem;
  background-color: var(--token-bg);
  color: var(--token-text);
  padding: 14px 18px;
  border-radius: var(--radius-md);
  user-select: all;
  word-break: break-all;
  line-height: 1.6;
  transition: background-color 0.2s;
}

/* --- Category Filter --- */

.category-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 24px;
}

.category-filter .btn {
  font-size: 0.8rem;
}

/* --- Login --- */

.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: 32px 24px;
}

.login-card {
  width: 100%;
  max-width: 400px;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-md);
  transition: background-color 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.login-card h1,
.login-card h2 {
  text-align: center;
  margin-bottom: 24px;
}

/* --- Empty State --- */

.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* --- Settings --- */

.settings-grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.stat-section {
  background-color: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: background-color 0.2s, border-color 0.2s;
}

.stat-section h3 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.stat-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 0;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.stat-value {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
}

.stat-public {
  color: var(--success);
  font-weight: 600;
}

.stat-private {
  color: var(--text-muted);
  font-weight: 600;
}

.stat-empty {
  font-size: 0.875rem;
  font-style: italic;
  color: var(--text-muted);
  padding: 6px 0;
}

/* --- Tag Cloud --- */

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag-cloud .badge strong {
  font-weight: 700;
  margin-left: 2px;
}

/* --- Responsive: Mobile (<640px) --- */

@media (max-width: 639px) {
  .nav-inner {
    flex-wrap: wrap;
    height: auto;
    padding: 12px 16px;
    gap: 8px;
  }

  .nav-links {
    width: 100%;
    order: 3;
    gap: 4px;
  }

  .nav-links a {
    padding: 6px 8px;
    font-size: 0.8rem;
  }

  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  main {
    padding: 20px 0;
  }

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

  .page-header h1 {
    font-size: 1.4rem;
  }

  .form {
    max-width: 100%;
  }

  .stats-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .detail-row {
    flex-direction: column;
    gap: 4px;
    padding: 12px 16px;
  }

  .detail-label {
    width: auto;
  }

  .bookmark-card {
    padding: 16px;
  }

  .card {
    padding: 16px;
  }

  .login-card {
    padding: 24px;
  }

  .table th,
  .table td {
    padding: 10px 12px;
  }
}

/* --- Focus Visible Utilities --- */

a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* --- Selection --- */

::selection {
  background-color: var(--accent);
  color: #ffffff;
}

/* --- Scrollbar (Webkit) --- */

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background-color: var(--border);
  border-radius: var(--radius-full);
  border: 2px solid var(--bg);
}

::-webkit-scrollbar-thumb:hover {
  background-color: var(--text-muted);
}