/* 登录页样式 */
:root {
  --bg-primary: #0a0b14;
  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-glow: rgba(99, 102, 241, 0.4);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-color: rgba(255, 255, 255, 0.08);
  --radius-md: 12px;
  --transition: all 0.25s ease;
}

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

html, body {
  height: 100%;
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-bg {
  position: fixed;
  inset: 0;
  overflow: hidden;
}

.login-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.2;
}

.login-glow-1 {
  width: 400px;
  height: 400px;
  background: var(--accent-primary);
  top: -100px;
  left: -100px;
}

.login-glow-2 {
  width: 300px;
  height: 300px;
  background: var(--accent-secondary);
  bottom: -50px;
  right: -50px;
}

.login-container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 420px;
  padding: 20px;
}

.login-card {
  background: rgba(20, 22, 39, 0.9);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 40px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.login-header {
  text-align: center;
  margin-bottom: 32px;
}

.login-logo {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
}

.login-logo svg {
  width: 100%;
  height: 100%;
}

.login-header h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.login-header p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

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

.login-form label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.login-form input {
  width: 100%;
  padding: 12px 16px;
  background: rgba(15, 16, 32, 0.8);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 1rem;
  transition: var(--transition);
}

.login-form input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

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

.login-error {
  color: #ef4444;
  font-size: 0.85rem;
  margin-bottom: 16px;
  min-height: 20px;
}

.login-btn {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border: none;
  border-radius: 8px;
  color: white;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.login-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.35);
}

.login-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.btn-loading {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.login-footer {
  text-align: center;
  margin-top: 24px;
}

.login-footer a {
  color: var(--text-muted);
  font-size: 0.85rem;
  text-decoration: none;
}

.login-footer a:hover {
  color: var(--accent-primary);
}