/* ============================================
   TG Proxy Manager — Dark Theme Stylesheet
   ============================================ */

/* --- CSS Variables --- */
:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --border: #30363d;
  --text-primary: #e6edf3;
  --text-muted: #7d8590;
  --accent-blue: #2563eb;
  --accent-green: #16a34a;
  --accent-red: #dc2626;
  --accent-amber: #d97706;
  --fr-color: #f59e0b;
  --de-color: #8b5cf6;

  --font-ui: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --sidebar-w: 220px;
  --header-h: 56px;
  --radius: 8px;
  --radius-sm: 6px;
  --transition: 0.2s ease;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-ui);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-mono);
  font-weight: 600;
  line-height: 1.3;
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.15rem; }

a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: #4b83f0; }

code, .mono {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

/* --- Layout --- */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  transition: transform 0.3s ease;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.sidebar-logo .logo-icon {
  width: 28px;
  height: 28px;
  background: var(--accent-blue);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 500;
  border-left: 3px solid transparent;
  transition: all var(--transition);
}

.sidebar-nav a:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.sidebar-nav a.active {
  color: var(--text-primary);
  background: rgba(37, 99, 235, 0.08);
  border-left-color: var(--accent-blue);
}

.sidebar-nav a .nav-icon {
  width: 20px;
  text-align: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.sidebar-footer {
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Main area */
.main-area {
  flex: 1;
  margin-left: var(--sidebar-w);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Header */
.header {
  height: var(--header-h);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-title {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  animation: pulse-dot 2s ease-in-out infinite;
  flex-shrink: 0;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(22, 163, 74, 0.5); }
  50% { opacity: 0.7; box-shadow: 0 0 0 6px rgba(22, 163, 74, 0); }
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.3rem;
  cursor: pointer;
  padding: 4px;
}

/* Content */
.content {
  flex: 1;
  padding: 24px;
  max-width: 1280px;
  width: 100%;
}

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

.page-header h1 {
  margin: 0;
}

/* --- Cards --- */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: border-color var(--transition);
}

.card:hover {
  border-color: #3d444d;
}

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

.card-title {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Stat cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.stat-card .stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.stat-card .stat-value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
}

.stat-card .stat-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.stat-card.fr .stat-value { color: var(--fr-color); }
.stat-card.de .stat-value { color: var(--de-color); }

/* --- Tables --- */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

thead th {
  background: var(--bg-tertiary);
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.3px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

tbody td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

tbody tr:nth-child(even) {
  background: var(--bg-tertiary);
}

tbody tr:hover {
  background: rgba(37, 99, 235, 0.05);
}

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

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-family: var(--font-ui);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  line-height: 1.4;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent-blue);
  color: #fff;
}
.btn-primary:hover:not(:disabled) {
  background: #1d4ed8;
}

.btn-danger {
  background: var(--accent-red);
  color: #fff;
}
.btn-danger:hover:not(:disabled) {
  background: #b91c1c;
}

.btn-success {
  background: var(--accent-green);
  color: #fff;
}
.btn-success:hover:not(:disabled) {
  background: #15803d;
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover:not(:disabled) {
  color: var(--text-primary);
  border-color: #3d444d;
  background: var(--bg-tertiary);
}

.btn-sm {
  padding: 5px 10px;
  font-size: 0.82rem;
}

.btn-icon {
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.btn-icon:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
  border-color: var(--border);
}

.btn-outline-danger {
  background: transparent;
  color: var(--accent-red);
  border: 1px solid var(--accent-red);
}
.btn-outline-danger:hover:not(:disabled) {
  background: rgba(220, 38, 38, 0.1);
}

/* --- Forms --- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
}

.form-input,
.form-select,
.form-textarea {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: 0.9rem;
  transition: border-color var(--transition);
  outline: none;
  width: 100%;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form-input::placeholder {
  color: var(--text-muted);
  opacity: 0.6;
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%237d8590' d='M6 8.825L1.175 4 2.238 2.938 6 6.7 9.763 2.937 10.825 4z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

/* Radio cards */
.radio-cards {
  display: flex;
  gap: 10px;
}

.radio-card {
  flex: 1;
  position: relative;
}

.radio-card input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.radio-card label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 12px 8px;
  background: var(--bg-tertiary);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
  font-size: 0.85rem;
}

.radio-card label:hover {
  border-color: #3d444d;
}

.radio-card input:checked + label {
  border-color: var(--accent-blue);
  background: rgba(37, 99, 235, 0.08);
}

.radio-card .flag {
  font-size: 1.4rem;
}

/* Checkbox */
.checkbox-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--accent-blue);
  cursor: pointer;
}

/* --- Modal --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 24px;
  animation: fadeIn 0.15s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 520px;
  max-height: 85vh;
  overflow-y: auto;
  animation: slideUp 0.2s ease;
}

@keyframes slideUp {
  from { transform: translateY(12px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 {
  font-size: 1.05rem;
}

.modal-body {
  padding: 20px;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}

/* --- Slider --- */
.slider-wrap {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: linear-gradient(to right, var(--fr-color) 0%, var(--fr-color) var(--val, 50%), var(--de-color) var(--val, 50%), var(--de-color) 100%);
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--text-primary);
  border: 2px solid var(--bg-primary);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
  cursor: grab;
  transition: transform 0.1s;
}

input[type="range"]::-webkit-slider-thumb:active {
  cursor: grabbing;
  transform: scale(1.15);
}

input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--text-primary);
  border: 2px solid var(--bg-primary);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
  cursor: grab;
}

/* Weight bar */
.weight-bar {
  display: flex;
  height: 32px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
}

.weight-bar .bar-fr {
  background: var(--fr-color);
  color: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: width 0.4s ease;
  min-width: 0;
}

.weight-bar .bar-de {
  background: var(--de-color);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: width 0.4s ease;
  min-width: 0;
}

/* Preset buttons */
.presets {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.preset-btn {
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--bg-tertiary);
  color: var(--text-muted);
  font-size: 0.82rem;
  cursor: pointer;
  transition: all var(--transition);
}

.preset-btn:hover {
  border-color: var(--accent-blue);
  color: var(--text-primary);
}

.preset-btn.active {
  border-color: var(--accent-blue);
  background: rgba(37, 99, 235, 0.12);
  color: var(--text-primary);
}

/* --- Toast Notifications --- */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column-reverse;
  gap: 8px;
  z-index: 300;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  animation: toastIn 0.3s ease;
  min-width: 260px;
  max-width: 400px;
}

.toast.removing {
  animation: toastOut 0.25s ease forwards;
}

.toast.success { border-left: 3px solid var(--accent-green); }
.toast.error { border-left: 3px solid var(--accent-red); }
.toast.info { border-left: 3px solid var(--accent-blue); }
.toast.warning { border-left: 3px solid var(--accent-amber); }

@keyframes toastIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes toastOut {
  from { transform: translateX(0); opacity: 1; }
  to { transform: translateX(100%); opacity: 0; }
}

/* --- Status Dots --- */
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}

.status-dot.green { background: var(--accent-green); }
.status-dot.red { background: var(--accent-red); }
.status-dot.amber { background: var(--accent-amber); }

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
}

.status-badge.active {
  background: rgba(22, 163, 74, 0.12);
  color: var(--accent-green);
}

.status-badge.revoked {
  background: rgba(220, 38, 38, 0.12);
  color: var(--accent-red);
}

.status-badge.expiring {
  background: rgba(217, 119, 6, 0.12);
  color: var(--accent-amber);
}

/* --- Traffic Flow Diagram --- */
.flow-diagram {
  display: flex;
  align-items: center;
  gap: 0;
  padding: 24px 0;
  overflow-x: auto;
}

.flow-node {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  text-align: center;
  min-width: 120px;
  flex-shrink: 0;
}

.flow-node .node-icon {
  font-size: 1.5rem;
  margin-bottom: 6px;
}

.flow-node .node-label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
}

.flow-node .node-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.flow-node.fr { border-color: var(--fr-color); }
.flow-node.de { border-color: var(--de-color); }

.flow-arrow {
  display: flex;
  align-items: center;
  color: var(--text-muted);
  padding: 0 8px;
  font-size: 1.2rem;
  flex-shrink: 0;
}

/* --- Tunnel Status Cards --- */
.tunnel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.tunnel-card {
  border-radius: var(--radius);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  padding: 20px;
}

.tunnel-card.fr { border-top: 3px solid var(--fr-color); }
.tunnel-card.de { border-top: 3px solid var(--de-color); }

.tunnel-card .tunnel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.tunnel-card .tunnel-name {
  font-family: var(--font-mono);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.tunnel-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.tunnel-meta dt {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.tunnel-meta dd {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  margin: 0;
}

/* --- Danger Zone --- */
.danger-zone {
  border: 1px solid var(--accent-red);
  border-radius: var(--radius);
  padding: 20px;
}

.danger-zone h3 {
  color: var(--accent-red);
  margin-bottom: 12px;
}

/* --- Search & Filter Bar --- */
.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.search-input {
  position: relative;
  flex: 1;
  min-width: 200px;
}

.search-input .form-input {
  padding-left: 36px;
}

.search-input .search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.9rem;
  pointer-events: none;
}

/* --- Pagination --- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
}

/* --- QR Code --- */
.qr-container {
  display: flex;
  justify-content: center;
  padding: 16px;
  background: #fff;
  border-radius: var(--radius);
}

/* --- Login Page --- */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  position: relative;
  overflow: hidden;
}

.login-page::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, transparent 50%, rgba(139, 92, 246, 0.05) 100%);
  animation: gradientShift 12s ease infinite alternate;
}

@keyframes gradientShift {
  0% {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, transparent 50%, rgba(139, 92, 246, 0.05) 100%);
  }
  100% {
    background: linear-gradient(225deg, rgba(37, 99, 235, 0.05) 0%, transparent 50%, rgba(245, 158, 11, 0.04) 100%);
  }
}

.login-card {
  position: relative;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px;
  width: 100%;
  max-width: 380px;
  text-align: center;
  z-index: 1;
}

.login-card .login-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.login-card h1 {
  font-size: 1.3rem;
  margin-bottom: 4px;
}

.login-card .login-subtitle {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-bottom: 28px;
}

.login-card .form-input {
  text-align: center;
  font-size: 1rem;
  padding: 12px;
}

.login-card .btn {
  width: 100%;
  padding: 11px;
  font-size: 0.95rem;
  margin-top: 12px;
}

.login-error {
  background: rgba(220, 38, 38, 0.1);
  border: 1px solid rgba(220, 38, 38, 0.3);
  border-radius: var(--radius-sm);
  padding: 10px;
  font-size: 0.85rem;
  color: var(--accent-red);
  margin-bottom: 16px;
}

/* --- Grid helpers --- */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.gap-16 { gap: 16px; }
.gap-24 { gap: 24px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-mono { font-family: var(--font-mono); }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.w-full { width: 100%; }

.hidden-text {
  filter: blur(5px);
  user-select: none;
  transition: filter 0.2s;
}
.hidden-text.revealed {
  filter: none;
  user-select: text;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main-area {
    margin-left: 0;
  }

  .mobile-toggle {
    display: block;
  }

  .content {
    padding: 16px;
  }

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

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

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

  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .flow-diagram {
    flex-wrap: wrap;
    justify-content: center;
  }

  .modal {
    max-width: 100%;
    margin: 12px;
  }

  .radio-cards {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

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

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #30363d;
}

/* Selection */
::selection {
  background: rgba(37, 99, 235, 0.3);
}

/* Spinner */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  display: inline-block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
}

.empty-state .empty-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
  opacity: 0.5;
}