/* ========================================
   Login Page Theme Fix - Proper Light/Dark Implementation
   ======================================== */

/* Light theme (default) */
:root {
  --login-bg-gradient-start: #667eea;
  --login-bg-gradient-end: #764ba2;
  --login-card-bg: #ffffff;
  --login-card-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --login-title-color: #1a202c;
  --login-subtitle-color: #718096;
  --login-label-color: #4a5568;
  --login-input-bg: #ffffff;
  --login-input-border: #e2e8f0;
  --login-input-color: #1a202c;
  --login-input-focus-border: #667eea;
  --login-input-focus-shadow: rgba(102, 126, 234, 0.1);
  --login-btn-primary-bg: #667eea;
  --login-btn-primary-hover: #5a67d8;
  --login-btn-primary-text: #ffffff;
  --login-btn-secondary-bg: #ffffff;
  --login-btn-secondary-border: #667eea;
  --login-btn-secondary-text: #667eea;
  --login-btn-secondary-hover-bg: #667eea;
  --login-btn-secondary-hover-text: #ffffff;
  --login-divider-color: #e2e8f0;
  --login-divider-text-bg: #ffffff;
  --login-divider-text-color: #a0aec0;
  --login-link-color: #667eea;
  --login-link-hover: #5a67d8;
  --login-error-color: #e53e3e;
  --login-error-bg: #fed7d7;
  --login-success-bg: #c6f6d5;
  --login-success-color: #22543d;
  --login-lang-btn-bg: #ffffff;
  --login-lang-btn-border: #e2e8f0;
  --login-lang-btn-color: #4a5568;
  --login-lang-btn-hover-bg: #f7fafc;
  --login-lang-btn-active-bg: #667eea;
  --login-lang-btn-active-color: #ffffff;
}

/* Dark theme */
[data-theme="dark"] {
  --login-bg-gradient-start: #1a202c;
  --login-bg-gradient-end: #2d3748;
  --login-card-bg: #2d3748;
  --login-card-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
  --login-title-color: #f7fafc;
  --login-subtitle-color: #a0aec0;
  --login-label-color: #cbd5e0;
  --login-input-bg: #1a202c;
  --login-input-border: #4a5568;
  --login-input-color: #e2e8f0;
  --login-input-focus-border: #9f7aea;
  --login-input-focus-shadow: rgba(159, 122, 234, 0.2);
  --login-btn-primary-bg: #9f7aea;
  --login-btn-primary-hover: #b794f4;
  --login-btn-primary-text: #1a202c;
  --login-btn-secondary-bg: transparent;
  --login-btn-secondary-border: #9f7aea;
  --login-btn-secondary-text: #9f7aea;
  --login-btn-secondary-hover-bg: #9f7aea;
  --login-btn-secondary-hover-text: #1a202c;
  --login-divider-color: #4a5568;
  --login-divider-text-bg: #2d3748;
  --login-divider-text-color: #718096;
  --login-link-color: #9f7aea;
  --login-link-hover: #b794f4;
  --login-error-color: #fc8181;
  --login-error-bg: #742a2a;
  --login-success-bg: #22543d;
  --login-success-color: #c6f6d5;
  --login-lang-btn-bg: #1a202c;
  --login-lang-btn-border: #4a5568;
  --login-lang-btn-color: #cbd5e0;
  --login-lang-btn-hover-bg: #2d3748;
  --login-lang-btn-active-bg: #9f7aea;
  --login-lang-btn-active-color: #1a202c;
}

/* Apply CSS variables to elements */
.login-container {
  background: linear-gradient(135deg, var(--login-bg-gradient-start) 0%, var(--login-bg-gradient-end) 100%);
  transition: background 0.3s ease;
}

.login-card {
  background: var(--login-card-bg);
  box-shadow: var(--login-card-shadow);
  transition: all 0.3s ease;
}

.login-title {
  color: var(--login-title-color);
  transition: color 0.3s ease;
}

.login-subtitle {
  color: var(--login-subtitle-color);
  transition: color 0.3s ease;
}

.form-label {
  color: var(--login-label-color);
  transition: color 0.3s ease;
}

.form-control {
  background: var(--login-input-bg);
  border-color: var(--login-input-border);
  color: var(--login-input-color);
  transition: all 0.3s ease;
}

.form-control:focus {
  border-color: var(--login-input-focus-border);
  box-shadow: 0 0 0 3px var(--login-input-focus-shadow);
  background: var(--login-input-bg);
}

.form-control::placeholder {
  color: var(--login-subtitle-color);
  opacity: 0.6;
}

.btn-primary {
  background: var(--login-btn-primary-bg);
  color: var(--login-btn-primary-text);
  border: none;
  transition: all 0.3s ease;
}

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

.btn-secondary {
  background: var(--login-btn-secondary-bg);
  border-color: var(--login-btn-secondary-border);
  color: var(--login-btn-secondary-text);
  transition: all 0.3s ease;
}

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

.divider {
  background: var(--login-divider-color);
  transition: background 0.3s ease;
}

.divider::after {
  background: var(--login-divider-text-bg);
  color: var(--login-divider-text-color);
  transition: all 0.3s ease;
}

a {
  color: var(--login-link-color);
  transition: color 0.3s ease;
}

a:hover {
  color: var(--login-link-hover);
}

/* Language selector buttons with theme support */
.lang-btn {
  background: var(--login-lang-btn-bg);
  border-color: var(--login-lang-btn-border);
  color: var(--login-lang-btn-color);
  transition: all 0.3s ease;
}

.lang-btn:hover {
  background: var(--login-lang-btn-hover-bg);
}

.lang-btn.active {
  background: var(--login-lang-btn-active-bg);
  color: var(--login-lang-btn-active-color);
  border-color: var(--login-lang-btn-active-bg);
}

/* Theme toggle button styling */
#theme-toggle-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1000;
}

.theme-toggle-btn {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background: var(--login-card-bg);
  border: 2px solid var(--login-input-border);
  color: var(--login-title-color);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.theme-toggle-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.theme-toggle-btn svg {
  width: 1.5rem;
  height: 1.5rem;
  transition: transform 0.3s ease;
}

.theme-toggle-btn:hover svg {
  transform: rotate(20deg);
}

/* Alert styles with theme support */
.alert-error {
  background: var(--login-error-bg);
  color: var(--login-error-color);
  border: 1px solid var(--login-error-color);
  transition: all 0.3s ease;
}

.alert-success {
  background: var(--login-success-bg);
  color: var(--login-success-color);
  border: 1px solid var(--login-success-color);
  transition: all 0.3s ease;
}

/* Smooth transitions for theme switching */
* {
  transition-property: background-color, border-color, color, fill, stroke;
  transition-duration: 0.3s;
  transition-timing-function: ease;
}

/* Override aggressive transitions for performance */
input, button {
  transition-property: background-color, border-color, color, box-shadow, transform;
  transition-duration: 0.2s;
}

/* Accessibility: Respect user's motion preferences */
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --login-card-shadow: 0 0 0 2px var(--login-input-border);
  }
  
  [data-theme="dark"] {
    --login-card-shadow: 0 0 0 2px var(--login-input-border);
  }
  
  .form-control {
    border-width: 2px;
  }
  
  .btn-primary, .btn-secondary {
    border-width: 2px;
    font-weight: 600;
  }
}