/* 
 * AI.PHNX.DEV Login CSS - 2026 Design System
 * Modern, accessible, mobile-first design with 2026 best practices
 */

/* ===== CSS Custom Properties (Design Tokens) ===== */
:root {
  /* Color System - 2026 Standards */
  --color-primary: #6366f1;
  --color-primary-dark: #4f46e5;
  --color-primary-light: #818cf8;
  --color-primary-ultralight: #e0e7ff;
  
  --color-secondary: #10b981;
  --color-secondary-dark: #059669;
  --color-secondary-light: #34d399;
  
  --color-danger: #ef4444;
  --color-warning: #f59e0b;
  --color-success: #10b981;
  --color-info: #3b82f6;
  
  /* Neutral Colors */
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  --color-gray-950: #030712;
  
  /* Background & Surface */
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f9fafb;
  --color-bg-tertiary: #f3f4f6;
  --color-bg-overlay: rgba(0, 0, 0, 0.5);
  
  /* Text Colors */
  --color-text-primary: #111827;
  --color-text-secondary: #4b5563;
  --color-text-tertiary: #6b7280;
  --color-text-inverse: #ffffff;
  --color-text-disabled: #9ca3af;
  
  /* Border & Divider */
  --color-border: #e5e7eb;
  --color-border-hover: #d1d5db;
  --color-border-focus: var(--color-primary);
  --color-divider: #f3f4f6;
  
  /* Shadow System - 2026 Depth */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.05);
  
  /* Typography - 2026 Scale */
  --font-family-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-mono: 'JetBrains Mono', 'SF Mono', Monaco, 'Cascadia Code', monospace;
  
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 1.875rem;  /* 30px */
  --font-size-4xl: 2.25rem;   /* 36px */
  --font-size-5xl: 3rem;      /* 48px */
  
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  
  /* Spacing - 8px Grid System */
  --space-0: 0;
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */
  
  /* Border Radius */
  --radius-none: 0;
  --radius-sm: 0.25rem;   /* 4px */
  --radius-md: 0.5rem;    /* 8px */
  --radius-lg: 0.75rem;   /* 12px */
  --radius-xl: 1rem;      /* 16px */
  --radius-2xl: 1.5rem;   /* 24px */
  --radius-full: 9999px;
  
  /* Transitions & Animations */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Z-index Layers */
  --z-below: -1;
  --z-base: 0;
  --z-above: 1;
  --z-dropdown: 10;
  --z-sticky: 20;
  --z-fixed: 30;
  --z-modal: 40;
  --z-popover: 50;
  --z-toast: 60;
  --z-tooltip: 70;
  
  /* Container Widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;
}

/* ===== Dark Theme ===== */
[data-theme="dark"] {
  --color-bg-primary: #111827;
  --color-bg-secondary: #1f2937;
  --color-bg-tertiary: #374151;
  
  --color-text-primary: #f9fafb;
  --color-text-secondary: #e5e7eb;
  --color-text-tertiary: #d1d5db;
  --color-text-inverse: #111827;
  
  --color-border: #374151;
  --color-border-hover: #4b5563;
  --color-divider: #1f2937;
  
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.4), 0 1px 2px -1px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
}

/* ===== Base Reset & Accessibility ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
}

/* ===== Skip Link (Accessibility) ===== */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-2) var(--space-4);
  text-decoration: none;
  border-radius: var(--radius-md);
  z-index: var(--z-tooltip);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-2);
  outline: 2px solid var(--color-primary-light);
  outline-offset: 2px;
}

/* ===== Main Container ===== */
.login-container {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-primary) 100%);
}

/* ===== Background Elements ===== */
.background-elements {
  position: absolute;
  inset: 0;
  z-index: var(--z-below);
  overflow: hidden;
}

.gradient-blob {
  position: absolute;
  border-radius: var(--radius-full);
  filter: blur(60px);
  opacity: 0.15;
  animation: float 20s ease-in-out infinite;
}

.blob-1 {
  width: 400px;
  height: 400px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  top: -200px;
  right: -200px;
  animation-delay: 0s;
}

.blob-2 {
  width: 300px;
  height: 300px;
  background: linear-gradient(135deg, var(--color-info) 0%, var(--color-primary-light) 100%);
  bottom: -150px;
  left: -150px;
  animation-delay: -5s;
}

.blob-3 {
  width: 250px;
  height: 250px;
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-info) 100%);
  top: 50%;
  left: 10%;
  animation-delay: -10s;
}

.grid-pattern {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(to right, var(--color-border) 1px, transparent 1px),
    linear-gradient(to bottom, var(--color-border) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.05;
  mask-image: radial-gradient(circle at center, black, transparent 70%);
}

@keyframes float {
  0%, 100% {
    transform: translate(0, 0) rotate(0deg);
  }
  33% {
    transform: translate(30px, -50px) rotate(120deg);
  }
  66% {
    transform: translate(-20px, 20px) rotate(240deg);
  }
}

/* ===== Login Card ===== */
.login-card {
  width: 100%;
  max-width: 440px;
  background: var(--color-bg-primary);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-2xl);
  border: 1px solid var(--color-border);
  position: relative;
  z-index: var(--z-base);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

/* ===== Header ===== */
.login-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-8);
}

.logo-container {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.logo-icon {
  width: 40px;
  height: 40px;
  color: var(--color-primary);
}

.logo-text {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
}

.logo-primary {
  color: var(--color-primary);
}

.logo-secondary {
  color: var(--color-text-secondary);
}

.header-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.security-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  background: var(--color-primary-ultralight);
  color: var(--color-primary-dark);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
}

.badge-icon {
  font-size: var(--font-size-sm);
}

.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--color-bg-tertiary);
  border-color: var(--color-border-hover);
}

.theme-toggle:active {
  transform: scale(0.95);
}

/* ===== Welcome Section ===== */
.welcome-section {
  margin-bottom: var(--space-8);
}

.welcome-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-2);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.welcome-subtitle {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  font-size: var(--font-size-lg);
}

.security-features {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.feature {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}

.feature-icon {
  font-size: var(--font-size-sm);
}

/* ===== Form Styles ===== */
.login-form {
  margin-bottom: var(--space-8);
}

.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
}

.form-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-2);
}

.label-text {
  display: inline-block;
}

.label-required {
  color: var(--color-danger);
  margin-left: var(--space-1);
}

.input-container {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: var(--space-3);
  color: var(--color-text-tertiary);
  pointer-events: none;
  font-size: var(--font-size-lg);
}

.form-input {
  width: 100%;
  padding: var(--space-3) var(--space-3) var(--space-3) calc(var(--space-3) * 2 + 1em);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  outline: none;
}
.input_password {
    width: 100% !important;
    padding-right: calc(var(--space-3) * 2 + 1em + 44px) !important;
    border-bottom-right-radius: var(--radius-md) !important;
    border-top-right-radius: var(--radius-md) !important;
}

.form-input:hover {
  border-color: var(--color-border-hover);
}

.form-input:focus {
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px var(--color-primary-ultralight);
}

.form-input:disabled {
  background: var(--color-bg-secondary);
  color: var(--color-text-disabled);
  cursor: not-allowed;
}

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

.input-clear {
  position: absolute;
  right: 8px;
  top: 6px;
  transform: none;
  width: 18px;
  height: 18px;
  border: none;
  background: var(--color-bg-tertiary);
  color: var(--color-text-tertiary);
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  transition: all var(--transition-fast);
  z-index: 20;
}

.input-clear:hover {
  background: var(--color-gray-300);
  color: var(--color-text-primary);
}

.passwordclear {
  right: 44px !important;
  left: auto !important;
  z-index: 20 !important;
}
.password-toggle {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-text-tertiary);
  transition: color var(--transition-fast), background var(--transition-fast);
  padding: 0;
  font-size: 1.1em;
  z-index: 10;
}

.password-toggle:hover {
  color: var(--color-text-secondary);
}

.input_password:focus ~ .password-toggle {
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px var(--color-primary-ultralight);
}

.form-help {
  margin-top: var(--space-1);
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  line-height: var(--line-height-normal);
}

/* ===== Form Options ===== */
.form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-8);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  user-select: none;
}

.checkbox-input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.checkbox-custom {
  width: 18px;
  height: 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-primary);
  position: relative;
  transition: all var(--transition-fast);
}

.checkbox-input:checked + .checkbox-custom {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.checkbox-input:checked + .checkbox-custom::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 6px;
  width: 5px;
  height: 10px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.checkbox-input:focus + .checkbox-custom {
  box-shadow: 0 0 0 3px var(--color-primary-ultralight);
}

.checkbox-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

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

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

/* ===== Submit Button ===== */
.submit-button {
  width: 100%;
  padding: var(--space-3) var(--space-6);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-text-inverse);
  border: none;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.submit-button:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.submit-button:active:not(:disabled) {
  transform: translateY(0);
}

.submit-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.button-text {
  position: relative;
  z-index: var(--z-above);
}

.button-loader {
  display: flex;
  gap: var(--space-1);
  position: relative;
  z-index: var(--z-above);
}

.loader-dot {
  width: 6px;
  height: 6px;
  background: var(--color-text-inverse);
  border-radius: var(--radius-full);
  animation: pulse 1.4s ease-in-out infinite;
}

.loader-dot:nth-child(2) {
  animation-delay: 0.2s;
}

.loader-dot:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes pulse {
  0%, 100% {
    opacity: 0.4;
    transform: scale(0.8);
  }
  50% {
    opacity: 1;
    transform: scale(1);
  }
}

.button-icon {
  position: relative;
  z-index: var(--z-above);
  transition: transform var(--transition-fast);
}

.submit-button:hover .button-icon:not(:disabled) {
  transform: translateX(4px);
}

/* ===== Security Status ===== */
.security-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
  padding: var(--space-2) var(--space-3);
  background: var(--color-success);
  color: var(--color-text-inverse);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  animation: slideIn 0.3s ease-out;
}

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

.status-icon {
  font-size: var(--font-size-base);
}

/* ===== Alternative Login ===== */
.alternative-login {
  margin-bottom: var(--space-8);
}

.divider {
  display: flex;
  align-items: center;
  margin: var(--space-6) 0;
  color: var(--color-text-tertiary);
  font-size: var(--font-size-sm);
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

.divider-text {
  padding: 0 var(--space-3);
}

.social-buttons {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.social-button {
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  background: var(--color-bg-primary);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  transition: all var(--transition-fast);
}

.social-button:hover:not(:disabled) {
  background: var(--color-bg-secondary);
  border-color: var(--color-border-hover);
}

.social-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.social-icon {
  font-weight: var(--font-weight-bold);
}

.social-note {
  text-align: center;
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  line-height: var(--line-height-normal);
}

/* ===== Footer ===== */
.login-footer {
  text-align: center;
}

.footer-text {
  margin-bottom: var(--space-4);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.footer-link {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: var(--font-weight-semibold);
  transition: color var(--transition-fast);
}

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

.footer-links {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.footer-small-link {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-small-link:hover {
  color: var(--color-text-secondary);
}

.footer-separator {
  color: var(--color-text-tertiary);
  font-size: var(--font-size-xs);
}

.copyright {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  font-family: var(--font-family-mono);
}

/* ===== Toast Notifications ===== */
.toast-container {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-width: 400px;
}

.toast {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  animation: toastSlideIn 0.3s ease-out;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.toast-success {
  background: var(--color-success);
  color: var(--color-text-inverse);
}

.toast-error {
  background: var(--color-danger);
  color: var(--color-text-inverse);
}

.toast-warning {
  background: var(--color-warning);
  color: var(--color-text-inverse);
}

.toast-info {
  background: var(--color-info);
  color: var(--color-text-inverse);
}

@keyframes toastSlideIn {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ===== Modal ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-bg-overlay);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.modal {
  background: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  max-width: 400px;
  width: 90%;
  box-shadow: var(--shadow-2xl);
  position: relative;
  animation: modalFadeIn 0.3s ease-out;
}

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

.modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 32px;
  height: 32px;
  border: none;
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

.modal-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-3);
  color: var(--color-text-primary);
}

.modal-text {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  line-height: var(--line-height-relaxed);
}

.modal-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.modal-input {
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-base);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  transition: all var(--transition-fast);
}

.modal-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-ultralight);
}

.modal-button {
  padding: var(--space-3) var(--space-6);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-text-inverse);
  border: none;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.modal-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ===== Responsive Design ===== */
@media (max-width: 640px) {
  .login-card {
    padding: var(--space-6);
    border-radius: var(--radius-xl);
  }
  
  .login-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
  }
  
  .header-meta {
    width: 100%;
    justify-content: space-between;
  }
  
  .welcome-title {
    font-size: var(--font-size-2xl);
  }
  
  .welcome-subtitle {
    font-size: var(--font-size-base);
  }
  
  .security-features {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .social-buttons {
    grid-template-columns: 1fr;
  }
  
  .form-options {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }
  
  .forgot-password {
    align-self: flex-end;
  }
}

@media (max-width: 480px) {
  .login-container {
    padding: var(--space-2);
  }
  
  .login-card {
    padding: var(--space-4);
    border-radius: var(--radius-lg);
  }
  
  .welcome-title {
    font-size: var(--font-size-xl);
  }
  
  .form-input {
    padding: var(--space-2) var(--space-2) var(--space-2) calc(var(--space-3) * 2 + 1em);
  }
  
  .submit-button {
    padding: var(--space-2) var(--space-4);
  }
}

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

/* ===== High Contrast Mode ===== */
@media (prefers-contrast: high) {
  :root {
    --color-primary: #0000ff;
    --color-primary-dark: #0000cc;
    --color-primary-light: #6666ff;
    
    --color-text-primary: #000000;
    --color-text-secondary: #333333;
    --color-border: #000000;
  }
}

/* ===== Print Styles ===== */
@media print {
  .background-elements,
  .theme-toggle,
  .security-badge,
  .alternative-login,
  .footer-links,
  .toast-container,
  .modal-overlay {
    display: none !important;
  }
  
  .login-container {
    background: white !important;
    padding: 0 !important;
  }
  
  .login-card {
    box-shadow: none !important;
    border: 1px solid #000 !important;
    max-width: 100% !important;
  }
}

/* ===== Tab Navigation ===== */
.auth-tabs {
  display: flex;
  gap: var(--space-1);
  margin-bottom: var(--space-8);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-1);
}

.auth-tab {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.auth-tab:hover {
  color: var(--color-text-primary);
  background: var(--color-bg-secondary);
}

.auth-tab.active {
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

.auth-tab.active::after {
  content: '';
  position: absolute;
  bottom: calc(-1 * var(--space-1) - 1px);
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
}

.tab-icon {
  font-size: var(--font-size-base);
}

.tab-text {
  white-space: nowrap;
}

/* Auth Panels */
.auth-panel {
  display: none;
}

.auth-panel.active {
  display: block;
  animation: fadeIn var(--transition-normal) ease-out;
}

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

/* ===== Registration Page Specific Styles ===== */
.error-message {
  margin-top: var(--space-1);
  font-size: var(--font-size-xs);
  color: var(--color-danger);
  line-height: var(--line-height-normal);
  display: block;
}

.error-message[hidden] {
  display: none !important;
}

.error-message::before {
  content: '⚠️';
  font-size: var(--font-size-sm);
  margin-right: var(--space-1);
}

.password-strength {
  margin-top: var(--space-3);
}

.strength-bar {
  height: 4px;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: var(--space-1);
}

.strength-fill {
  height: 100%;
  width: 0%;
  background: var(--color-danger);
  border-radius: var(--radius-full);
  transition: width var(--transition-normal), background-color var(--transition-normal);
}

.strength-fill.weak {
  background: var(--color-danger);
  width: 25%;
}

.strength-fill.fair {
  background: var(--color-warning);
  width: 50%;
}

.strength-fill.good {
  background: var(--color-info);
  width: 75%;
}

.strength-fill.strong {
  background: var(--color-success);
  width: 100%;
}

.strength-text {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

.checkbox-link {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.login-link-section {
  margin-top: var(--space-8);
  text-align: center;
}

.login-link-text {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.login-link {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: var(--font-weight-semibold);
  transition: color var(--transition-fast);
}

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

/* Registration page responsive adjustments */
@media (max-width: 640px) {
  .auth-tabs {
    margin-bottom: var(--space-6);
  }
  
  .auth-tab {
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-xs);
  }
  
  .tab-icon {
    font-size: var(--font-size-sm);
  }
  
  .login-link-section {
    margin-top: var(--space-6);
  }
}

@media (max-width: 480px) {
  .auth-tabs {
    margin-bottom: var(--space-4);
  }
  
  .auth-tab {
    flex-direction: column;
    gap: var(--space-1);
    padding: var(--space-2);
  }
  
  .login-link-section {
    margin-top: var(--space-4);
  }
}