/*
 * Login Page Styles - Modern Minimal Design
 * For AI MarTech Sandbox Apps
 * Version: 1.1 - Portal Color Scheme
 * Last Updated: 2025-01-20
 */

/* ========================================
   CSS Variables - Design Tokens
   ======================================== */
:root {
  /* Color Palette - Portal Theme (深藍灰 + 青綠) */
  --login-bg-primary: #f8f9fa;
  --login-bg-secondary: #ffffff;
  --login-text-primary: #2C3E50;
  --login-text-secondary: #6c757d;
  --login-text-muted: #95a5a6;
  --login-accent: #2C3E50;
  --login-accent-hover: #1a252f;
  --login-accent-light: #34495e;
  --login-border: #e9ecef;
  --login-border-focus: #2C3E50;
  --login-error: #E74C3C;
  --login-success: #18BC9C;
  --login-warning: #F39C12;
  --login-info: #3498db;

  /* Typography - Using DM Sans for modern feel */
  --login-font-display: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --login-font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing */
  --login-spacing-xs: 0.5rem;
  --login-spacing-sm: 0.75rem;
  --login-spacing-md: 1rem;
  --login-spacing-lg: 1.5rem;
  --login-spacing-xl: 2rem;
  --login-spacing-2xl: 3rem;

  /* Borders & Shadows - Portal style */
  --login-radius-sm: 8px;
  --login-radius-md: 12px;
  --login-radius-lg: 16px;
  --login-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --login-shadow-md: 0 2px 10px rgba(0, 0, 0, 0.1);
  --login-shadow-lg: 0 4px 15px rgba(0, 0, 0, 0.12);
  --login-shadow-xl: 0 8px 25px rgba(0, 0, 0, 0.15);

  /* Transitions */
  --login-transition-fast: 150ms ease;
  --login-transition-base: 250ms ease;
  --login-transition-slow: 350ms ease;
}

/* ========================================
   Google Fonts Import
   ======================================== */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;1,9..40,400&display=swap');

/* ========================================
   Login Page Background
   ======================================== */
.login-page-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #f5f7fa 0%, #e4e8eb 100%);
  padding: var(--login-spacing-lg);
  position: relative;
  overflow: hidden;
}

/* Subtle background pattern - Portal style */
.login-page-wrapper::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(44, 62, 80, 0.03) 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(24, 188, 156, 0.03) 0%, transparent 40%);
  pointer-events: none;
}

/* ========================================
   Login Card Container
   ======================================== */
.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--login-bg-secondary);
  border-radius: var(--login-radius-lg);
  box-shadow: var(--login-shadow-xl);
  padding: var(--login-spacing-2xl);
  position: relative;
  z-index: 1;
  animation: loginCardEnter 0.6s var(--login-transition-slow) both;
}

@keyframes loginCardEnter {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========================================
   Logo Section
   ======================================== */
.login-logo-container {
  text-align: center;
  margin-bottom: var(--login-spacing-xl);
  animation: logoEnter 0.5s var(--login-transition-base) 0.2s both;
}

@keyframes logoEnter {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.login-logo-container img {
  height: 100px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 3px 6px rgba(0, 0, 0, 0.08));
  transition: transform var(--login-transition-base);
}

.login-logo-container img:hover {
  transform: scale(1.02);
}

/* ========================================
   Title Section
   ======================================== */
.login-title {
  font-family: var(--login-font-display);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--login-text-primary);
  text-align: center;
  margin-bottom: var(--login-spacing-xs);
  letter-spacing: -0.025em;
}

.login-subtitle {
  font-family: var(--login-font-body);
  font-size: 0.9375rem;
  color: var(--login-text-secondary);
  text-align: center;
  margin-bottom: var(--login-spacing-xl);
  font-weight: 400;
}

/* ========================================
   Form Elements
   ======================================== */
.login-form-group {
  margin-bottom: var(--login-spacing-lg);
  animation: formGroupEnter 0.4s var(--login-transition-base) both;
}

.login-form-group:nth-child(1) { animation-delay: 0.3s; }
.login-form-group:nth-child(2) { animation-delay: 0.4s; }
.login-form-group:nth-child(3) { animation-delay: 0.5s; }

@keyframes formGroupEnter {
  from {
    opacity: 0;
    transform: translateX(-10px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.login-label {
  display: block;
  font-family: var(--login-font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--login-text-primary);
  margin-bottom: var(--login-spacing-xs);
  letter-spacing: 0.01em;
}

/* ========================================
   Input Fields
   ======================================== */
.login-input,
.login-card .form-control,
.login-card input[type="text"],
.login-card input[type="password"] {
  width: 100%;
  padding: var(--login-spacing-sm) var(--login-spacing-md);
  font-family: var(--login-font-body);
  font-size: 0.9375rem;
  color: var(--login-text-primary);
  background: var(--login-bg-secondary);
  border: 1.5px solid var(--login-border);
  border-radius: var(--login-radius-sm);
  outline: none;
  transition:
    border-color var(--login-transition-fast),
    box-shadow var(--login-transition-fast),
    background-color var(--login-transition-fast);
}

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

.login-input:hover,
.login-card .form-control:hover {
  border-color: var(--login-border-focus);
}

.login-input:focus,
.login-card .form-control:focus {
  border-color: var(--login-accent);
  box-shadow: 0 0 0 3px rgba(44, 62, 80, 0.12);
  background: var(--login-bg-secondary);
}

/* ========================================
   Select Dropdown (Language Selector)
   ======================================== */
.login-select,
.login-card select,
.login-card .selectize-input {
  width: 100%;
  padding: var(--login-spacing-sm) var(--login-spacing-md);
  font-family: var(--login-font-body);
  font-size: 0.875rem;
  color: var(--login-text-secondary);
  background: var(--login-bg-primary);
  border: 1.5px solid var(--login-border);
  border-radius: var(--login-radius-sm);
  cursor: pointer;
  transition: all var(--login-transition-fast);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236c757d' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
}

.login-select:hover,
.login-card select:hover {
  border-color: var(--login-border-focus);
  background-color: var(--login-bg-secondary);
}

.login-select:focus,
.login-card select:focus {
  outline: none;
  border-color: var(--login-accent);
  box-shadow: 0 0 0 3px rgba(44, 62, 80, 0.12);
}

/* ========================================
   Login Button
   ======================================== */
.login-button,
.login-card .btn-primary,
.login-card .action-button {
  width: 100%;
  padding: var(--login-spacing-sm) var(--login-spacing-lg);
  font-family: var(--login-font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  color: #ffffff;
  background: var(--login-accent);
  border: none;
  border-radius: var(--login-radius-sm);
  cursor: pointer;
  transition: all var(--login-transition-base);
  position: relative;
  overflow: hidden;
  letter-spacing: 0.01em;
}

.login-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 100%);
  opacity: 0;
  transition: opacity var(--login-transition-fast);
}

.login-button:hover,
.login-card .btn-primary:hover {
  background: var(--login-accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--login-shadow-md);
}

.login-button:hover::before {
  opacity: 1;
}

.login-button:active,
.login-card .btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--login-shadow-sm);
}

.login-button:disabled {
  background: var(--login-text-muted);
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* ========================================
   Alert Messages
   ======================================== */
.login-alert,
.login-card .alert {
  padding: var(--login-spacing-sm) var(--login-spacing-md);
  border-radius: var(--login-radius-sm);
  font-family: var(--login-font-body);
  font-size: 0.875rem;
  margin-bottom: var(--login-spacing-md);
  display: flex;
  align-items: center;
  gap: var(--login-spacing-xs);
  animation: alertEnter 0.3s var(--login-transition-base) both;
}

@keyframes alertEnter {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.login-alert-error,
.login-card .alert-danger,
.login-card .alert-warning {
  background: rgba(220, 38, 38, 0.08);
  color: var(--login-error);
  border: 1px solid rgba(220, 38, 38, 0.15);
}

.login-alert-success,
.login-card .alert-success {
  background: rgba(5, 150, 105, 0.08);
  color: var(--login-success);
  border: 1px solid rgba(5, 150, 105, 0.15);
}

.login-alert-info,
.login-card .alert-info {
  background: rgba(15, 23, 42, 0.05);
  color: var(--login-text-secondary);
  border: 1px solid rgba(15, 23, 42, 0.1);
}

/* ========================================
   bs4Dash Card Override
   ======================================== */
.login-wrapper .card,
.login-wrapper .bs4Card {
  border: none !important;
  box-shadow: var(--login-shadow-xl) !important;
  border-radius: var(--login-radius-lg) !important;
  background: var(--login-bg-secondary) !important;
}

.login-wrapper .card-header {
  background: transparent !important;
  border-bottom: none !important;
  padding: var(--login-spacing-xl) var(--login-spacing-2xl) 0 !important;
}

.login-wrapper .card-title {
  font-family: var(--login-font-display) !important;
  font-size: 1.5rem !important;
  font-weight: 600 !important;
  color: var(--login-text-primary) !important;
  text-align: center !important;
  letter-spacing: -0.025em !important;
}

.login-wrapper .card-body {
  padding: var(--login-spacing-lg) var(--login-spacing-2xl) var(--login-spacing-2xl) !important;
}

/* Override bs4Dash default gradient background */
.login-gradient {
  background: var(--login-bg-primary) !important;
  min-height: 100vh;
  padding: var(--login-spacing-lg);
}

/* ========================================
   Shiny Input Overrides
   ======================================== */
.login-wrapper .shiny-input-container {
  margin-bottom: var(--login-spacing-lg);
}

.login-wrapper .control-label {
  font-family: var(--login-font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--login-text-primary);
  margin-bottom: var(--login-spacing-xs);
}

.login-wrapper .form-group {
  margin-bottom: var(--login-spacing-lg);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 480px) {
  .login-page-wrapper {
    padding: var(--login-spacing-md);
  }

  .login-card,
  .login-wrapper .card-body {
    padding: var(--login-spacing-xl) !important;
  }

  .login-title {
    font-size: 1.5rem;
  }

  .login-logo-container img {
    height: 60px;
  }
}

/* ========================================
   Dark Mode Support (Future)
   ======================================== */
@media (prefers-color-scheme: dark) {
  /* Dark mode styles can be added here */
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
  .login-page-wrapper {
    background: white;
  }

  .login-card {
    box-shadow: none;
    border: 1px solid #e5e7eb;
  }
}