:root {
  --bg-color: #0f172a;
  --card-bg: rgba(30, 41, 59, 0.85);
  --card-border: rgba(255, 255, 255, 0.1);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-light: rgba(59, 130, 246, 0.15);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.15);
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.15);
  --input-bg: #1e293b;
  --input-border: #334155;
  --input-focus: #3b82f6;
  --shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
  --radius: 14px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg-color: #f1f5f9;
    --card-bg: rgba(255, 255, 255, 0.95);
    --card-border: rgba(0, 0, 0, 0.08);
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-light: rgba(37, 99, 235, 0.1);
    --danger: #dc2626;
    --danger-bg: rgba(220, 38, 38, 0.1);
    --success: #059669;
    --success-bg: rgba(5, 150, 105, 0.1);
    --input-bg: #ffffff;
    --input-border: #cbd5e1;
    --input-focus: #2563eb;
    --shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  }
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background-image: radial-gradient(circle at 50% 0%, rgba(59, 130, 246, 0.12) 0%, transparent 70%);
}

.auth-container {
  width: 100%;
  max-width: 440px;
}

.auth-card {
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2.25rem 2rem;
  transition: all 0.3s ease;
}

.auth-header {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--accent-light);
  color: var(--accent);
  margin-bottom: 1rem;
  font-size: 28px;
}

.auth-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 0.5rem;
}

.auth-subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

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

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--input-border);
  background-color: var(--input-bg);
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus {
  border-color: var(--input-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
}

.code-input {
  font-family: monospace;
  font-size: 1.75rem;
  letter-spacing: 0.4em;
  text-align: center;
  padding: 0.6rem 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.25rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background-color 0.2s, transform 0.1s;
  text-decoration: none;
}

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

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

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

.btn-secondary {
  background-color: transparent;
  border: 1px solid var(--input-border);
  color: var(--text-secondary);
}

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

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

.btn-danger:hover {
  filter: brightness(0.9);
}

.alert {
  padding: 0.8rem 1rem;
  border-radius: 8px;
  font-size: 0.875rem;
  line-height: 1.4;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.alert-error {
  background-color: var(--danger-bg);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.alert-success {
  background-color: var(--success-bg);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.qr-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
  background: white;
  border-radius: 12px;
  margin: 0.5rem 0;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.qr-box img {
  width: 180px;
  height: 180px;
  display: block;
}

.secret-badge {
  display: inline-block;
  font-family: monospace;
  font-size: 0.95rem;
  letter-spacing: 0.1em;
  padding: 0.4rem 0.8rem;
  background: #f1f5f9;
  color: #0f172a;
  border-radius: 6px;
  border: 1px solid #cbd5e1;
  word-break: break-all;
}

.auth-footer {
  margin-top: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

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

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

/* Dashboard specific styles */
.dashboard-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.info-card {
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 10px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
}

.info-label {
  color: var(--text-secondary);
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.6rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
}

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

.badge-warning {
  background: rgba(245, 158, 11, 0.15);
  color: #f59e0b;
}

.badge-danger {
  background: var(--danger-bg);
  color: var(--danger);
}

.auth-container.wide {
  max-width: 1000px;
}

.admin-table-container {
  width: 100%;
  overflow-x: auto;
  margin-top: 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--input-border);
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  text-align: left;
}

.admin-table th, .admin-table td {
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--input-border);
  vertical-align: middle;
}

.admin-table th {
  background: rgba(0, 0, 0, 0.15);
  color: var(--text-secondary);
  font-weight: 600;
  white-space: nowrap;
}

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

.admin-table tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

.btn-sm {
  padding: 0.3rem 0.6rem;
  font-size: 0.78rem;
  border-radius: 6px;
  cursor: pointer;
  border: none;
  font-weight: 500;
}

.btn-danger-sm {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-danger-sm:hover {
  background: var(--danger);
  color: white;
}

.btn-secondary-sm {
  background: var(--input-bg);
  color: var(--text-primary);
  border: 1px solid var(--input-border);
}

.btn-secondary-sm:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-primary-sm {
  background: var(--accent);
  color: white;
  border: 1px solid var(--accent);
}

.btn-primary-sm:hover {
  background: var(--accent-hover);
}

.actions-group {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.code-badge {
  display: inline-block;
  font-family: monospace;
  font-size: 0.8rem;
  background: rgba(0, 0, 0, 0.2);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  color: var(--accent);
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.admin-form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.75rem;
  align-items: flex-end;
}

details summary {
  cursor: pointer;
  user-select: none;
  font-weight: 600;
  color: var(--accent);
}

details summary:hover {
  text-decoration: underline;
}