:root {
  --navy: #0D1B2A;
  --navy-light: #1B2A4A;
  --blue: #1E5FBB;
  --blue-light: #E8F0FE;
  --green: #007A5E;
  --green-light: #E6F4F0;
  --red: #C8102E;
  --red-light: #FDE8EC;
  --gray-50: #F5F6FA;
  --gray-100: #E8EAF0;
  --gray-200: #D1D5DE;
  --gray-500: #7C8499;
  --gray-700: #4A5168;
  --gray-900: #1A1F2E;
  --white: #FFFFFF;
  --shadow-sm: 0 1px 2px rgba(13,27,42,0.06);
  --shadow-md: 0 2px 8px rgba(13,27,42,0.08);
  --shadow-lg: 0 4px 16px rgba(13,27,42,0.10);
  --radius: 8px;
  --radius-sm: 4px;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  background: var(--gray-50);
  color: var(--gray-900);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Auth page */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
}

.auth-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 420px;
  padding: 32px;
}

.auth-header {
  text-align: center;
  margin-bottom: 24px;
}
.auth-header h2 {
  font-size: 22px;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 6px;
}
.auth-header p {
  font-size: 13px;
  color: var(--gray-500);
}

.auth-tabs {
  display: flex;
  border-bottom: 1px solid var(--gray-100);
  margin-bottom: 24px;
}
.auth-tab {
  flex: 1;
  text-align: center;
  padding: 12px 0;
  cursor: pointer;
  color: var(--gray-500);
  font-weight: 500;
  position: relative;
}
.auth-tab.active {
  color: var(--blue);
  font-weight: 600;
}
.auth-tab.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 25%;
  width: 50%;
  height: 2px;
  background: var(--blue);
  border-radius: 2px 2px 0 0;
}

.auth-form .form-item {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: 14px;
}
.auth-form label {
  font-size: 12px;
  color: var(--gray-500);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}
.auth-form input {
  padding: 10px 12px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--gray-900);
  transition: border-color var(--transition);
}
.auth-form input:focus {
  border-color: var(--blue);
  outline: none;
  box-shadow: 0 0 0 3px var(--blue-light);
}

.code-input-group {
  display: flex;
  gap: 8px;
}
.code-input-group input {
  flex: 1;
}
.code-input-group button {
  white-space: nowrap;
}

.auth-hint {
  text-align: center;
  font-size: 12px;
  color: var(--gray-500);
  margin-top: 16px;
}
.auth-hint a {
  color: var(--blue);
  text-decoration: none;
}

button {
  padding: 8px 20px;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: all var(--transition);
  letter-spacing: 0.3px;
}
button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
.btn-primary {
  background: var(--blue);
  color: var(--white);
  box-shadow: 0 1px 3px rgba(30,95,187,0.3);
}
.btn-primary:hover:not(:disabled) {
  background: #1A52A3;
  box-shadow: 0 2px 6px rgba(30,95,187,0.4);
}
.btn-default {
  background: var(--white);
  border: 1px solid var(--gray-200);
  color: var(--gray-700);
}
.btn-default:hover:not(:disabled) {
  border-color: var(--blue);
  color: var(--blue);
  background: var(--blue-light);
}

.error {
  color: var(--red);
  background: var(--red-light);
  border: 1px solid #F5A3B0;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  font-size: 13px;
}

/* Header user */
.header-user {
  display: flex;
  align-items: center;
  gap: 10px;
}
.header-user .avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), #1A52A3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  color: var(--white);
  flex-shrink: 0;
}
.header-user .user-name {
  font-size: 13px;
  opacity: 0.9;
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.header-user a {
  color: var(--white);
  font-size: 13px;
  text-decoration: none;
  opacity: 0.75;
  padding: 4px 10px;
  border-radius: 4px;
  transition: all var(--transition);
}
.header-user a:hover {
  opacity: 1;
  background: rgba(255,255,255,0.1);
}

/* Toast notification */
.toast {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  box-shadow: 0 4px 20px rgba(13,27,42,0.15);
  animation: toastIn 0.3s ease-out;
  max-width: 360px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.toast.success { background: var(--green); color: var(--white); }
.toast.error { background: var(--red); color: var(--white); }
.toast.info { background: var(--navy); color: var(--white); }
@keyframes toastIn {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes toastOut {
  from { opacity: 1; transform: translateX(0); }
  to { opacity: 0; transform: translateX(20px); }
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--gray-500);
}
.empty-state .empty-icon {
  font-size: 48px;
  margin-bottom: 12px;
  opacity: 0.4;
}
.empty-state .empty-text {
  font-size: 14px;
  margin-bottom: 4px;
}
.empty-state .empty-hint {
  font-size: 12px;
  opacity: 0.7;
}

/* Table row animation */
@keyframes rowIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}
.table-wrap tbody tr {
  animation: rowIn 0.2s ease-out both;
}
.table-wrap tbody tr:nth-child(1) { animation-delay: 0s; }
.table-wrap tbody tr:nth-child(2) { animation-delay: 0.02s; }
.table-wrap tbody tr:nth-child(3) { animation-delay: 0.04s; }
.table-wrap tbody tr:nth-child(4) { animation-delay: 0.06s; }
.table-wrap tbody tr:nth-child(5) { animation-delay: 0.08s; }
.table-wrap tbody tr:nth-child(6) { animation-delay: 0.10s; }
.table-wrap tbody tr:nth-child(7) { animation-delay: 0.12s; }
.table-wrap tbody tr:nth-child(8) { animation-delay: 0.14s; }
.table-wrap tbody tr:nth-child(9) { animation-delay: 0.16s; }
.table-wrap tbody tr:nth-child(10) { animation-delay: 0.18s; }

/* Scrollbar styling */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--gray-200); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--gray-500); }

/* Tab content transition */
.tab-content {
  animation: fadeIn 0.25s ease-out;
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Responsive */
@media (max-width: 768px) {
  .header-user .user-name { max-width: 80px; }
  .toast { top: 10px; right: 10px; left: 10px; max-width: none; }
}