/* ============================================
   LOGIN PAGE - ENTERPRISE-GRADE DESIGN
   Page: login.html (Standalone)
   All styles scoped to .login-page
   ============================================ */

/* ============================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================ */
.login-page {
  /* Primary Colors - Black/White Theme */
  --login-primary: #000000;
  --login-secondary: #333333;
  --login-accent: #1a1a1a;

  /* Gray Scale System (Tailwind-inspired) */
  --login-gray-50: #fafafa;
  --login-gray-100: #f5f5f5;
  --login-gray-150: #f0f0f0;
  --login-gray-200: #e5e5e5;
  --login-gray-250: #dddddd;
  --login-gray-300: #d4d4d4;
  --login-gray-400: #a3a3a3;
  --login-gray-500: #737373;
  --login-gray-600: #525252;
  --login-gray-700: #404040;
  --login-gray-800: #262626;
  --login-gray-900: #171717;

  /* Semantic Colors */
  --login-text-primary: #000000;
  --login-text-secondary: #333333;
  --login-text-muted: #666666;
  --login-text-light: #999999;
  --login-border: #dddddd;
  --login-border-light: #e5e5e5;
  --login-bg-input: #fafafa;
  --login-bg-white: #ffffff;

  /* Gradient System */
  --login-gradient-primary: linear-gradient(135deg, #1a1a1a 0%, #000000 100%);
  --login-gradient-secondary: linear-gradient(135deg, #333333 0%, #1a1a1a 100%);
  --login-gradient-subtle: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
  --login-gradient-card: linear-gradient(to bottom right, #ffffff, #f5f5f5);
  --login-gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.6) 100%);

  /* Multi-Layer Shadow System */
  --login-shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --login-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
  --login-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --login-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --login-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.12), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --login-shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --login-shadow-primary: 0 6px 20px -6px rgba(0, 0, 0, 0.3);
  --login-shadow-glow: 0 0 30px rgba(0, 0, 0, 0.08);

  /* Glass Morphism */
  --login-glass-bg: rgba(255, 255, 255, 0.9);
  --login-glass-border: rgba(229, 231, 235, 0.5);
  --login-glass-blur: blur(16px);

  /* Transition System */
  --login-transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --login-transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --login-transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --login-transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);

  /* Border Radius System */
  --login-radius-sm: 6px;
  --login-radius-md: 10px;
  --login-radius-lg: 16px;
  --login-radius-xl: 24px;
  --login-radius-2xl: 32px;
  --login-radius-full: 9999px;

  /* Z-Index Hierarchy */
  --z-base: 0;
  --z-content: 1;
  --z-card: 10;
  --z-input-icon: 5;
  --z-password-toggle: 10;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-tooltip: 1070;
}

/* ============================================
   BODY & BACKGROUND - Enhanced Depth
   ============================================ */
body.login-page {
  font-family: 'Open Sans', sans-serif;
  background: linear-gradient(180deg, #fafafa 0%, #f5f5f5 100%);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Ambient overlay for depth */
body.login-page::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 400px;
  background: linear-gradient(180deg, rgba(245, 245, 245, 0.5) 0%, transparent 100%);
  pointer-events: none;
  z-index: var(--z-base);
}

/* Subtle decorative shape */
body.login-page::after {
  content: '';
  position: fixed;
  top: -100px;
  right: -100px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(0,0,0,0.02) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: var(--z-base);
}

/* ============================================
   LOGIN CARD - Glass Morphism
   ============================================ */
.login-page .card {
  background: var(--login-glass-bg);
  backdrop-filter: var(--login-glass-blur);
  -webkit-backdrop-filter: var(--login-glass-blur);
  border: 1px solid var(--login-glass-border);
  border-radius: var(--login-radius-xl);
  box-shadow: var(--login-shadow-xl), var(--login-shadow-glow);
  transition: all var(--login-transition-slow);
  overflow: hidden;
  position: relative;
  z-index: var(--z-card);
}

/* Shimmer effect on card */
.login-page .card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 40%;
  height: 200%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.6), transparent);
  transform: rotate(25deg);
  animation: card-shimmer 6s infinite;
  opacity: 0.5;
  pointer-events: none;
}

.login-page .card:hover {
  box-shadow: var(--login-shadow-2xl), var(--login-shadow-glow);
  transform: translateY(-2px);
}

/* Card inner glow */
.login-page .card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, rgba(255,255,255,0.8), transparent 60%);
  pointer-events: none;
  opacity: 0.5;
  z-index: -1;
}

/* Card Header */
.login-page .card-header {
  position: relative;
  z-index: 1;
}

/* Card Body */
.login-page .card-body {
  position: relative;
  z-index: 1;
}

/* ============================================
   BRAND NAME TYPOGRAPHY
   ============================================ */
.login-page .brand-name {
  font-family: 'Poppins', sans-serif;
  letter-spacing: -0.5px;
  color: var(--login-primary) !important;
  font-weight: 700;
}

/* ============================================
   FORM CONTROLS - Premium Styling
   ============================================ */
.login-page .form-control,
.login-page .form-select {
  border: 2px solid var(--login-gray-200);
  border-radius: var(--login-radius-md);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--login-gray-800);
  background-color: var(--login-bg-white);
  padding: 0.875rem 1rem;
  transition: all var(--login-transition-base);
  position: relative;
}

/* Hover state */
.login-page .form-control:hover,
.login-page .form-select:hover {
  border-color: var(--login-gray-300);
  background-color: var(--login-gray-50);
}

/* Focus state with glow */
.login-page .form-control:focus,
.login-page .form-select:focus {
  border-color: var(--login-primary);
  box-shadow: 0 0 0 4px rgba(0, 0, 0, 0.08), var(--login-shadow-md);
  background-color: var(--login-bg-white);
  outline: none;
  transform: translateY(-1px);
}

/* With icon padding */
.login-page .form-control.ps-5 {
  padding-left: 3rem;
}

.login-page .form-control.pe-5 {
  padding-right: 3rem;
}

/* Invalid state */
.login-page .form-control.is-invalid,
.login-page .form-select.is-invalid {
  border-color: #dc3545;
  box-shadow: 0 0 0 4px rgba(220, 53, 69, 0.1);
}

/* Valid state */
.login-page .form-control.is-valid,
.login-page .form-select.is-valid {
  border-color: var(--login-primary);
  box-shadow: 0 0 0 4px rgba(0, 0, 0, 0.05);
}

/* ============================================
   INPUT ICONS - Enhanced Positioning
   ============================================ */
.login-page .input-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--login-gray-400);
  pointer-events: none;
  z-index: var(--z-input-icon);
  font-size: 1.1rem;
  transition: all var(--login-transition-base);
}

/* Icon color changes on focus */
.login-page .form-control:focus ~ .input-icon,
.login-page .form-control:focus + .input-icon {
  color: var(--login-primary);
  transform: translateY(-50%) scale(1.1);
}

/* ============================================
   BUTTONS - Premium Interactions
   ============================================ */
.login-page .btn {
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  border-radius: var(--login-radius-md);
  padding: 0.875rem 1.5rem;
  transition: all var(--login-transition-base);
  position: relative;
  overflow: hidden;
}

/* Ripple effect layer */
.login-page .btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.3) 0%, rgba(255,255,255,0) 100%);
  opacity: 0;
  transition: opacity var(--login-transition-base);
  pointer-events: none;
}

.login-page .btn:hover::before {
  opacity: 1;
}

/* Primary Login Button */
.login-page .btn-login {
  background-color: var(--login-primary);
  color: #ffffff;
  border: 2px solid var(--login-primary);
  box-shadow: var(--login-shadow-sm);
}

.login-page .btn-login:hover {
  background-color: var(--login-secondary);
  border-color: var(--login-secondary);
  transform: translateY(-2px);
  box-shadow: var(--login-shadow-primary);
  color: #ffffff;
}

.login-page .btn-login:active {
  transform: translateY(0);
  box-shadow: var(--login-shadow-xs);
}

/* Loading Button State */
.login-page .btn-login.loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}

.login-page .btn-login.loading::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  top: 50%;
  left: 50%;
  margin-left: -10px;
  margin-top: -10px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: #fff;
  animation: spin 0.8s linear infinite;
}

/* Pulse effect during loading */
.login-page .btn-login.loading::before {
  content: '';
  position: absolute;
  inset: -4px;
  border: 2px solid var(--login-primary);
  border-radius: inherit;
  animation: pulse-ring 1.5s cubic-bezier(0.4, 0, 0.2, 1) infinite;
  opacity: 1;
}

/* Secondary Buttons */
.login-page .btn-outline-dark {
  color: var(--login-primary);
  border: 2px solid var(--login-primary);
  background: transparent;
}

.login-page .btn-outline-dark:hover {
  background: var(--login-primary);
  border-color: var(--login-primary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--login-shadow-md);
}

/* Send OTP Button */
.login-page #btn-send-otp {
  background-color: var(--login-bg-white);
  color: var(--login-primary);
  border: 2px solid var(--login-primary);
}

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

/* ============================================
   PASSWORD TOGGLE - Micro-interaction
   ============================================ */
.login-page .password-toggle {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--login-gray-400);
  cursor: pointer;
  padding: 0.5rem;
  z-index: var(--z-password-toggle);
  border-radius: var(--login-radius-sm);
  transition: all var(--login-transition-base);
}

.login-page .password-toggle:hover {
  color: var(--login-primary);
  background: var(--login-gray-100);
  transform: translateY(-50%) scale(1.1);
}

.login-page .password-toggle:active {
  transform: translateY(-50%) scale(0.95);
}

/* Icon rotation on toggle (optional enhancement) */
.login-page .password-toggle i {
  transition: transform var(--login-transition-base);
}

/* ============================================
   CHECKBOXES - Enhanced Styling
   ============================================ */
.login-page .form-check-input {
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid var(--login-gray-300);
  border-radius: var(--login-radius-sm);
  transition: all var(--login-transition-base);
  cursor: pointer;
}

.login-page .form-check-input:hover {
  border-color: var(--login-primary);
  transform: scale(1.1);
}

.login-page .form-check-input:checked {
  background-color: var(--login-primary);
  border-color: var(--login-primary);
  box-shadow: 0 0 0 4px rgba(0, 0, 0, 0.08);
}

.login-page .form-check-label {
  cursor: pointer;
  transition: color var(--login-transition-base);
  user-select: none;
}

.login-page .form-check-label:hover {
  color: var(--login-primary);
}

/* ============================================
   PASSWORD STRENGTH INDICATOR
   ============================================ */
.login-page .strength-bar {
  display: flex;
  height: 100%;
  overflow: hidden;
  font-size: 0.75rem;
  background-color: transparent;
  border-radius: var(--login-radius-sm);
  transition: width var(--login-transition-slow), background-color var(--login-transition-slow);
  position: relative;
}

.login-page .strength-bar::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: shimmer 2s infinite;
  pointer-events: none;
}

.login-page .strength-bar.weak {
  width: 20% !important;
  background: linear-gradient(90deg, #cccccc, #999999) !important;
  box-shadow: 0 2px 8px rgba(204, 204, 204, 0.4);
}

.login-page .strength-bar.fair {
  width: 60% !important;
  background: linear-gradient(90deg, #999999, #666666) !important;
  box-shadow: 0 2px 8px rgba(153, 153, 153, 0.4);
}

.login-page .strength-bar.good {
  width: 80% !important;
  background: linear-gradient(90deg, #666666, #333333) !important;
  box-shadow: 0 2px 8px rgba(102, 102, 102, 0.4);
}

.login-page .strength-bar.strong {
  width: 100% !important;
  background: linear-gradient(90deg, #333333, #000000) !important;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

/* Strength Value Text Colors */
.login-page .strength-value.weak {
  color: #999999 !important;
}

.login-page .strength-value.fair {
  color: #777777 !important;
}

.login-page .strength-value.good {
  color: #555555 !important;
}

.login-page .strength-value.strong {
  color: var(--login-primary) !important;
}

/* Password Requirements Met State */
.login-page .password-requirements li.met {
  color: var(--login-primary) !important;
}

.login-page .password-requirements li.met i {
  color: var(--login-primary) !important;
}

/* ============================================
   MODAL - Glass Enhancement
   ============================================ */
.login-page .modal-content {
  border: none;
  border-radius: var(--login-radius-xl);
  background: var(--login-glass-bg);
  backdrop-filter: var(--login-glass-blur);
  -webkit-backdrop-filter: var(--login-glass-blur);
  box-shadow: var(--login-shadow-2xl);
  overflow: hidden;
}

/* Modal header with accent bar */
.login-page .modal-header {
  background: linear-gradient(to right, #ffffff, var(--login-gray-50));
  border-bottom: 1px solid var(--login-gray-200);
  padding: 1.5rem;
  position: relative;
}

.login-page .modal-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--login-gradient-primary);
}

/* Modal footer */
.login-page .modal-footer {
  background-color: var(--login-gray-50);
  border-top: 1px solid var(--login-gray-200);
  padding: 1rem 1.5rem;
}

/* Modal entrance animation */
.login-page .modal.fade .modal-dialog {
  transition: transform var(--login-transition-slow), opacity var(--login-transition-slow);
}

.login-page .modal.show .modal-dialog {
  animation: modal-slide-in 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ============================================
   LINKS - Hover Effects
   ============================================ */
.login-page a {
  text-decoration: none;
  position: relative;
  transition: all var(--login-transition-base);
  display: inline-block;
}

.login-page a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--login-primary);
  transition: width var(--login-transition-base);
}

.login-page a:hover::after {
  width: 100%;
}

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

/* ============================================
   FOOTER BADGE - Enhanced Styling
   ============================================ */
.login-page .position-fixed.bottom-0 {
  background: var(--login-glass-bg);
  backdrop-filter: var(--login-glass-blur);
  -webkit-backdrop-filter: var(--login-glass-blur);
  border: 1px solid var(--login-glass-border);
  box-shadow: var(--login-shadow-lg);
  animation: fadeIn 0.5s ease-out 0.8s both;
  transition: all var(--login-transition-base);
}

.login-page .position-fixed.bottom-0:hover {
  transform: translateX(-50%) translateY(-4px);
  box-shadow: var(--login-shadow-xl);
}

/* ============================================
   SOCIAL LOGIN BUTTONS
   ============================================ */
.login-page #g_id_onload,
.login-page #apple-signin-button {
  transition: all var(--login-transition-base);
  display: inline-block;
}

.login-page #g_id_onload:hover,
.login-page #apple-signin-button:hover {
  transform: translateY(-2px) scale(1.05);
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.15));
}

/* ============================================
   ANIMATIONS - Keyframes
   ============================================ */

/* Card shimmer animation */
@keyframes card-shimmer {
  0% {
    transform: translateX(-100%) rotate(25deg);
  }
  100% {
    transform: translateX(300%) rotate(25deg);
  }
}

/* Strength bar shimmer */
@keyframes shimmer {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

/* Loading spinner */
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Pulse ring for loading button */
@keyframes pulse-ring {
  0% {
    opacity: 0.6;
    transform: scale(1);
  }
  100% {
    opacity: 0;
    transform: scale(1.15);
  }
}

/* Enhanced card entrance animation */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Modal slide-in animation */
@keyframes modal-slide-in {
  from {
    opacity: 0;
    transform: translateY(-50px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Footer badge fade-in */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

/* Card entrance animation */
.login-page .animate-fadein {
  animation: fadeInUp 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ============================================
   ACCESSIBILITY - Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  .login-page *,
  .login-page *::before,
  .login-page *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Enhanced focus visibility for accessibility */
.login-page *:focus-visible {
  outline: 3px solid var(--login-primary);
  outline-offset: 2px;
  border-radius: var(--login-radius-sm);
}

.login-page .btn:focus-visible {
  outline: 3px solid var(--login-primary);
  outline-offset: 4px;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablet (max-width: 991.98px) */
@media (max-width: 991.98px) {
  .login-page .card {
    max-width: 420px;
    margin: 2rem auto;
  }

  .login-page .card-body {
    padding: 1.5rem;
  }
}

/* Mobile (max-width: 767.98px) */
@media (max-width: 767.98px) {
  .login-page .card {
    max-width: 100%;
    margin: 1rem;
    border-radius: var(--login-radius-lg);
  }

  .login-page .card-header {
    padding: 1.25rem;
  }

  .login-page .card-body {
    padding: 1.25rem;
  }

  body.login-page::after {
    display: none; /* Hide decorative shapes on mobile */
  }
}

/* Small mobile (max-width: 575.98px) */
@media (max-width: 575.98px) {
  .login-page .btn {
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
  }

  .login-page .form-control {
    font-size: 0.875rem;
    padding: 0.75rem 0.875rem;
  }

  .login-page .brand-name {
    font-size: 1.5rem !important;
  }

  .login-page .modal-dialog {
    margin: 0.5rem;
  }
}

/* Extra small mobile (max-width: 400px) */
@media (max-width: 400px) {
  .login-page .card {
    margin: 0.5rem;
  }

  .login-page .btn {
    font-size: 0.8rem;
  }
}

/* ============================================
   PRINT STYLES (Optional)
   ============================================ */
@media print {
  .login-page .card {
    box-shadow: none !important;
  }

  .login-page .btn {
    display: none !important;
  }

  body.login-page::before,
  body.login-page::after {
    display: none !important;
  }
}