/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* CSS Variables for Consistent Design */
:root {
  /* Primary Colors */
  --primary-purple: #8B5CF6;
  --primary-orange: #F59E0B;
  --primary-blue: #3B82F6;
  
  /* Secondary Colors */
  --secondary-purple: #A78BFA;
  --secondary-orange: #FCD34D;
  --secondary-blue: #60A5FA;
  
  /* Accent Colors */
  --accent-pink: #EC4899;
  --accent-green: #10B981;
  --accent-red: #EF4444;
  
  /* Neutral Colors */
  --white: #FFFFFF;
  --gray-50: #F9FAFB;
  --gray-100: #F3F4F6;
  --gray-200: #E5E7EB;
  --gray-300: #D1D5DB;
  --gray-400: #9CA3AF;
  --gray-500: #6B7280;
  --gray-600: #4B5563;
  --gray-700: #374151;
  --gray-800: #1F2937;
  --gray-900: #111827;
  --black: #000000;
  
  /* Dark Theme Colors */
  --dark-bg: #0F0F0F;
  --dark-surface: #1A1A1A;
  --dark-surface-light: #242424;
  --dark-border: #2D2D2D;
  --dark-text: #E5E5E5;
  --dark-text-muted: #A0A0A0;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--primary-purple) 0%, var(--primary-orange) 100%);
  --gradient-secondary: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-purple) 100%);
  --gradient-accent: linear-gradient(135deg, var(--accent-pink) 0%, var(--primary-purple) 100%);
  --gradient-dark: linear-gradient(135deg, var(--gray-800) 0%, var(--gray-900) 100%);
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --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);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* Spacing System */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-2xl: 2rem;
  --radius-full: 9999px;
  
  /* Typography */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;
  
  /* Line Heights */
  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
  
  /* Z-Index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-popover: 1050;
  --z-tooltip: 1060;
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--dark-bg);
  color: var(--dark-text);
  line-height: var(--leading-normal);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Background Overlay */
.background-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    linear-gradient(135deg, var(--dark-bg) 0%, var(--gray-900) 100%),
    radial-gradient(circle at 20% 80%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(245, 158, 11, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(59, 130, 246, 0.1) 0%, transparent 50%);
  z-index: -1;
}

/* Container */
.auth-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: var(--space-6);
  position: relative;
  z-index: 1;
}

/* Auth Card */
.auth-card {
  width: 100%;
  max-width: 450px;
  background: var(--dark-surface);
  backdrop-filter: blur(20px);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-2xl);
  position: relative;
  overflow: hidden;
}

.auth-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--gradient-primary);
  opacity: 0.5;
}

/* Header */
.auth-header {
  text-align: center;
  margin-bottom: var(--space-8);
}

.logo-section {
  margin-bottom: var(--space-6);
}

.logo-icon {
  width: 80px;
  height: 80px;
  background: var(--gradient-primary);
  border-radius: var(--radius-2xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-4);
  box-shadow: var(--shadow-lg);
}

.logo-icon i {
  font-size: var(--font-size-3xl);
  color: var(--white);
}

.logo-section h1 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--dark-text);
  margin-bottom: var(--space-2);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-section p {
  color: var(--dark-text-muted);
  font-size: var(--font-size-base);
}

/* Auth Toggle */
.auth-toggle {
  width: 280px;
  height: 60px;
  margin: 0 auto;
  position: relative;
  border-radius: var(--radius-xl);
  background-color: var(--dark-bg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-2);
  border: 1px solid var(--dark-border);
}

.toggle-btn {
  flex: 1;
  cursor: pointer;
  background: transparent;
  border: 0;
  outline: none;
  color: var(--dark-text-muted);
  text-align: center;
  font-size: var(--font-size-sm);
  font-weight: 600;
  position: relative;
  z-index: 1;
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  transition: var(--transition-fast);
}

.toggle-btn.active {
  color: var(--white);
}

.toggle-btn a {
  text-decoration: none;
  color: inherit;
}

.toggle-background {
  position: absolute;
  width: calc(50% - 4px);
  height: calc(100% - 8px);
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  transition: var(--transition-normal);
  top: 4px;
  left: 4px;
  box-shadow: var(--shadow-md);
}

/* Form Section */
.auth-form-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

/* Form Groups */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-group label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--dark-text);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-group label i {
  color: var(--primary-purple);
  width: 16px;
}

/* Form Inputs */
.form-input {
  width: 100%;
  padding: var(--space-4);
  background: var(--dark-bg);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-xl);
  color: var(--dark-text);
  font-size: var(--font-size-base);
  transition: var(--transition-fast);
  font-family: inherit;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-purple);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
  background: var(--dark-surface-light);
}

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

/* Password Input Wrapper */
.password-input-wrapper {
  position: relative;
}

.password-toggle {
  position: absolute;
  right: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--dark-text-muted);
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius);
  transition: var(--transition-fast);
}

.password-toggle:hover {
  color: var(--primary-purple);
  background: rgba(139, 92, 246, 0.1);
}

/* Form Options */
.form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.remember-me {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.checkbox {
  width: 18px;
  height: 18px;
  accent-color: var(--primary-purple);
  cursor: pointer;
}

.remember-me label {
  font-size: var(--font-size-sm);
  color: var(--dark-text-muted);
  cursor: pointer;
  text-transform: none;
  letter-spacing: normal;
  font-weight: 400;
}

.forgot-link {
  font-size: var(--font-size-sm);
  color: var(--primary-purple);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition-fast);
}

.forgot-link:hover {
  color: var(--secondary-purple);
  text-decoration: underline;
}

/* Submit Button */
.submit-btn {
  width: 100%;
  padding: var(--space-4) var(--space-6);
  background: var(--gradient-primary);
  color: var(--white);
  border: none;
  border-radius: var(--radius-xl);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-normal);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  box-shadow: var(--shadow-md);
}

.submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  filter: brightness(1.1);
}

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

/* Divider */
.divider {
  position: relative;
  text-align: center;
  margin: var(--space-4) 0;
}

.divider::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--dark-border);
}

.divider span {
  background: var(--dark-surface);
  padding: 0 var(--space-4);
  color: var(--dark-text-muted);
  font-size: var(--font-size-sm);
  font-weight: 500;
  position: relative;
  z-index: 1;
}

/* Google Button */
.google-btn {
  width: 100%;
  padding: var(--space-4) var(--space-6);
  background: var(--white);
  color: var(--gray-700);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-xl);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-normal);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  text-decoration: none;
  box-shadow: var(--shadow-sm);
}

.google-btn:hover {
  background: var(--gray-50);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.google-btn i {
  font-size: var(--font-size-lg);
  color: #4285f4;
}

/* Modern Popup */
.modern-popup {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
}

.modern-popup.show {
  opacity: 1;
  visibility: visible;
}

.popup-content {
  background: var(--dark-surface);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  text-align: center;
  position: relative;
  max-width: 400px;
  width: 90%;
  box-shadow: var(--shadow-2xl);
  transform: translateY(-50px);
  transition: transform var(--transition-normal);
}

.modern-popup.show .popup-content {
  transform: translateY(0);
}

.popup-content::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--gradient-primary);
}

.popup-icon {
  font-size: var(--font-size-5xl);
  margin-bottom: var(--space-4);
}

.success-icon {
  color: var(--accent-green);
}

.error-icon {
  color: var(--accent-red);
  display: none;
}

.modern-popup.error .popup-content::before {
  background: linear-gradient(135deg, var(--accent-red) 0%, #dc2626 100%);
}

.modern-popup.success .popup-content::before {
  background: linear-gradient(135deg, var(--accent-green) 0%, #059669 100%);
}

.popup-message {
  font-size: var(--font-size-base);
  line-height: var(--leading-relaxed);
  color: var(--dark-text);
  margin: var(--space-4) 0;
}

.popup-close-btn {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: var(--dark-text-muted);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.popup-close-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  color: var(--dark-text);
}

/* Responsive Design */
@media (max-width: 768px) {
  .auth-container {
    padding: var(--space-4);
  }
  
  .auth-card {
    padding: var(--space-6);
  }
  
  .logo-icon {
    width: 64px;
    height: 64px;
  }
  
  .logo-icon i {
    font-size: var(--font-size-2xl);
  }
  
  .logo-section h1 {
    font-size: var(--font-size-xl);
  }
  
  .auth-toggle {
    width: 240px;
    height: 50px;
  }
  
  .toggle-btn {
    font-size: var(--font-size-xs);
    padding: var(--space-2);
  }
  
  .form-options {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }
  
  .popup-content {
    margin: var(--space-4);
    width: calc(100% - 2rem);
    padding: var(--space-6);
  }
}

@media (max-width: 480px) {
  .auth-card {
    padding: var(--space-5);
  }
  
  .logo-section h1 {
    font-size: var(--font-size-lg);
  }
  
  .auth-toggle {
    width: 200px;
    height: 45px;
  }
  
  .popup-icon {
    font-size: var(--font-size-4xl);
  }
}