:root {
  /* Color scheme */
  --primary-color: #4f46e5;
  --primary-hover: #4338ca;
  --accent-color: #06b6d4;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  
  /* Light mode */
  --bg-light: #f9fafb;
  --card-bg-light: #ffffff;
  --text-primary-light: #111827;
  --text-secondary-light: #4b5563; 
  --border-light: #e5e7eb;
  
  /* Dark mode */
  --bg-dark: #0f172a;
  --card-bg-dark: #ffffff;
  --text-primary-dark: #f9fafb;
  --text-secondary-dark: #d1d5db;
  --border-dark: #334155;
  --card-text-dark: #111827;
  
  /* Shadows and effects */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  
  /* Animation durations */
  --anim-fast: 150ms;
  --anim-normal: 300ms;
  --anim-slow: 500ms;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  
  /* Border radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-full: 9999px;
}

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

html, body {
  height: 100%;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  transition: background-color var(--anim-normal), color var(--anim-normal);
}

body {
  background-color: var(--bg-light);
  color: var(--text-primary-light);
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  position: relative;
  min-height: 100vh;
  overflow-y: hidden;
}

[data-bs-theme="dark"] {
  --bs-body-bg: var(--bg-dark);
  --bs-body-color: var(--text-primary-dark);
}

[data-bs-theme="dark"] body {
  background-color: var(--bg-dark);
  color: var(--text-primary-dark);
}

.wrapper {
  min-height: calc(100vh - 60px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-lg);
}

.login-container {
  width: 100%;
  max-width: 420px;
  position: relative;
}

.login-card {
  background-color: var(--card-bg-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-lg) var(--spacing-xl);
  transition: all var(--anim-normal);
  border: 1px solid var(--border-light);
  animation: fadeIn var(--anim-normal) ease-out;
}

[data-bs-theme="dark"] .login-card {
  background-color: var(--card-bg-dark);
  border-color: var(--border-dark);
  box-shadow: var(--shadow-lg);
  color: var(--card-text-dark);
}

.login-header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.logo {
  font-weight: 700;
  color: var(--primary-color);
  font-size: 2rem;
  margin-bottom: var(--spacing-xs);
}

.subtitle {
  color: var(--text-secondary-light);
  font-weight: 500;
  margin-bottom: 0;
}

[data-bs-theme="dark"] .subtitle {
  color: var(--text-secondary-light);
}

.input-group {
  margin-bottom: var(--spacing-md);
}

.input-wrapper {
  position: relative;
  width: 100%;
}

.input-icon {
  position: absolute;
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary-light);
  transition: color var(--anim-fast);
}

[data-bs-theme="dark"] .input-icon {
  color: var(--text-secondary-light);
}

.input-wrapper input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) calc(var(--spacing-md) * 2.5);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  background-color: var(--card-bg-light);
  color: var(--text-primary-light);
  font-size: 1rem;
  transition: all var(--anim-normal);
}

[data-bs-theme="dark"] .input-wrapper input {
  background-color: #f9fafb;
  border-color: var(--border-light);
  color: var(--text-primary-light);
}

.input-wrapper input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.input-wrapper input:focus + .input-icon {
  color: var(--primary-color);
}

.form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.remember-me {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.form-check-input {
  width: 1rem;
  height: 1rem;
  margin-top: 0;
  background-color: var(--card-bg-light);
  border: 1px solid var(--border-light);
  cursor: pointer;
}

[data-bs-theme="dark"] .form-check-input {
  background-color: #f9fafb;
  border-color: var(--border-light);
}

.form-check-input:checked {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

.form-check-label {
  font-size: 0.875rem;
  color: var(--text-secondary-light);
  cursor: pointer;
}

[data-bs-theme="dark"] .form-check-label {
  color: var(--text-secondary-light);
}

.forgot-password {
  font-size: 0.875rem;
  color: var(--primary-color);
  text-decoration: none;
  transition: all var(--anim-fast);
}

.forgot-password:hover {
  text-decoration: underline;
  color: var(--primary-hover);
}

.login-btn {
  width: 100%;
  padding: var(--spacing-md);
  border: none;
  background-color: var(--primary-color);
  color: white;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--anim-normal);
  margin-bottom: var(--spacing-lg);
  display: flex;
  justify-content: center;
  align-items: center;
}

.login-btn:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.login-btn:active {
  transform: translateY(0);
}

.register-option {
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-secondary-light);
}

[data-bs-theme="dark"] .register-option {
  color: var(--text-secondary-light);
}

.register-link {
  color: var(--primary-color);
  font-weight: 600;
  text-decoration: none;
  transition: all var(--anim-fast);
  margin-left: var(--spacing-xs);
}

.register-link:hover {
  text-decoration: underline;
  color: var(--primary-hover);
}

.dark-mode-toggle {
  position: absolute;
  top: -50px;
  right: 0;
}

.dark-mode-btn {
  background: none;
  border: none;
  color: var(--text-secondary-light);
  font-size: 1.25rem;
  cursor: pointer;
  transition: all var(--anim-normal);
  padding: var(--spacing-sm);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

.dark-mode-btn:hover {
  color: var(--primary-color);
  transform: rotate(12deg);
}

.dark-icon {
  display: block;
}

.light-icon {
  display: none;
  color: var(--text-primary-dark);
}

[data-bs-theme="dark"] .dark-mode-btn:hover {
  color: var(--accent-color);
}

.alert {
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  animation: fadeIn var(--anim-normal) ease-out;
}

.alert-danger {
  background-color: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: var(--danger-color);
}

.alert-success {
  background-color: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
  color: var(--success-color);
}

/* Service status */
.service-status {
  text-align: center;
  margin-top: var(--spacing-md);
  font-size: 0.875rem;
  opacity: 0.8;
  transition: opacity var(--anim-normal);
}

.service-status:hover {
  opacity: 1;
}

.status-link {
  color: var(--text-secondary-light);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  transition: all var(--anim-normal);
}

[data-bs-theme="dark"] .status-link {
  color: var(--text-secondary-dark);
}

.status-link:hover {
  color: var(--primary-color);
}

[data-bs-theme="dark"] .status-link:hover {
  color: var(--accent-color);
}

.status-indicator {
  font-size: 0.625rem;
  color: var(--success-color);
}

.footer {
  padding: var(--spacing-xs) 0;
  margin-bottom: var(--spacing-md);
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-secondary-light);
  width: 100%;
  position: absolute;
  bottom: 0;
  left: 0;
}

[data-bs-theme="dark"] .footer {
  color: var(--text-secondary-dark);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 480px) {
  .login-card {
    padding: var(--spacing-lg);
  }
  
  .form-options {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }
  
  .forgot-password {
    align-self: flex-end;
  }
  
  .footer {
    margin-bottom: var(--spacing-sm);
  }
}