/* Modern Professional AI Company Login Design - Mobile First */
:root {
  /* Colors - Professional AI Theme */
  --primary-color: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
  --secondary-color: #64748b;
  --accent-color: #0ea5e9;
  
  /* AI Brand Colors */
  --ai-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --tech-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --pro-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  
  /* Grays */
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  
  /* Semantic Colors */
  --success-color: #22c55e;
  --warning-color: #f59e0b;
  --error-color: #ef4444;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-smooth: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 
               'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  line-height: 1.6;
  color: var(--gray-800);
  background: var(--gray-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Main Layout - Mobile First */
.modern-login-body {
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
}

.login-main {
  width: 100%;
  max-width: 400px;
}

.login-container {
  background: white;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Header Section */
.login-header {
  text-align: center;
  padding: var(--space-2xl) var(--space-xl) var(--space-xl);
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  position: relative;
  overflow: hidden;
}

.login-header::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="25" cy="25" r="15" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="10" fill="white" opacity="0.05"/><circle cx="50" cy="10" r="8" fill="white" opacity="0.08"/></svg>');
  animation: float 20s ease-in-out infinite;
  pointer-events: none;
}

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(180deg); }
}

.logo-container {
  margin-bottom: var(--space-lg);
  position: relative;
  z-index: 1;
}

.login-logo {
  height: 50px;
  width: auto;
  filter: brightness(0) invert(1);
}

.login-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  position: relative;
  z-index: 1;
}

.login-subtitle {
  font-size: 1rem;
  opacity: 0.9;
  font-weight: 400;
  position: relative;
  z-index: 1;
  max-width: 300px;
  margin: 0 auto;
}

/* Form Section */
.login-form-wrapper {
  padding: var(--space-2xl) var(--space-xl);
}

.login-form {
  width: 100%;
}

/* Form Groups */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: var(--space-sm);
}

.form-label-icon {
  color: var(--primary-color);
  font-size: 0.875rem;
}

/* Input Styles */
.input-wrapper {
  position: relative;
}

.form-input {
  width: 100%;
  padding: 1rem var(--space-md);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-lg);
  font-size: 1rem;
  background: white;
  color: var(--gray-800);
  transition: var(--transition-normal);
  min-height: 52px;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-input::placeholder {
  color: var(--gray-400);
}

/* Password Toggle */
.password-wrapper {
  position: relative;
}

.password-toggle {
  position: absolute;
  right: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--gray-400);
  cursor: pointer;
  padding: var(--space-sm);
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.password-toggle:hover {
  color: var(--gray-600);
  background: var(--gray-100);
}

/* Checkbox Styles */
.form-options {
  margin: var(--space-xl) 0;
}

.checkbox-wrapper {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  cursor: pointer;
  padding: var(--space-sm) 0;
}

.checkbox-input {
  display: none;
}

.checkbox-custom {
  width: 20px;
  height: 20px;
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-sm);
  position: relative;
  transition: var(--transition-fast);
  flex-shrink: 0;
  margin-top: 0.125rem;
}

.checkbox-custom::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 6px;
  width: 6px;
  height: 10px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) scale(0);
  transition: var(--transition-fast);
}

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

.checkbox-input:checked + .checkbox-custom::after {
  transform: rotate(45deg) scale(1);
}

.checkbox-label {
  font-size: 0.875rem;
  color: var(--gray-600);
  line-height: 1.5;
  user-select: none;
}

.terms-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
}

.terms-link:hover {
  text-decoration: underline;
}

/* Buttons */
.login-btn {
  width: 100%;
  padding: 1rem var(--space-xl);
  background: var(--ai-gradient);
  border: none;
  border-radius: var(--radius-lg);
  color: white;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-normal);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  min-height: 52px;
  position: relative;
  overflow: hidden;
}

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

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

.login-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.btn-text {
  position: relative;
  z-index: 1;
}

.btn-loader {
  display: none;
}

.btn-loader.show {
  display: block;
}

.btn-arrow {
  transition: var(--transition-fast);
}

.login-btn:hover .btn-arrow {
  transform: translateX(4px);
}

/* Loading State */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top: 2px solid white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Field Validation */
.form-input.error {
  border-color: var(--error-color);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.input-wrapper.error {
  position: relative;
}

.checkbox-wrapper.error .checkbox-custom {
  border-color: var(--error-color);
  box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.1);
}

.field-error {
  color: var(--error-color);
  font-size: 0.75rem;
  margin-top: var(--space-sm);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  opacity: 0;
  visibility: hidden;
  height: 0;
  overflow: hidden;
  transform: translateY(-5px);
  transition: all 0.3s ease;
}

.field-error.show {
  opacity: 1;
  visibility: visible;
  height: auto;
  transform: translateY(0);
}

.field-error i {
  font-size: 0.75rem;
}

/* Password Strength */
.password-strength {
  margin-top: var(--space-sm);
}

.password-strength small {
  color: var(--gray-500);
  font-size: 0.75rem;
}

/* Alert Messages */
.alert-message {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  font-weight: 500;
  margin-top: var(--space-lg);
  opacity: 0;
  transform: translateY(-10px);
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  position: relative;
  border-left: 4px solid;
}

.alert-message.show {
  opacity: 1;
  transform: translateY(0);
}

.alert-message.success {
  background: #f0fdf4;
  color: #166534;
  border-left-color: #22c55e;
  box-shadow: 0 4px 12px rgba(34, 197, 94, 0.15);
}

.alert-message.warning {
  background: #fffbeb;
  color: #92400e;
  border-left-color: #f59e0b;
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.15);
}

.alert-message.error {
  background: #fef2f2;
  color: #991b1b;
  border-left-color: #ef4444;
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.15);
}

.alert-message i {
  font-size: 1rem;
  opacity: 0.8;
}

/* Links */
.signup-link, .login-link {
  text-align: center;
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--gray-200);
  margin-top: var(--space-xl);
}

.signup-link p, .login-link p {
  color: var(--gray-600);
  font-size: 0.875rem;
  margin: 0;
}

.signup-link a, .login-link a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  margin-left: var(--space-sm);
}

.signup-link a:hover, .login-link a:hover {
  text-decoration: underline;
}

/* Success Modal */
.success-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-normal);
  padding: var(--space-md);
}

.success-modal.show {
  opacity: 1;
  visibility: visible;
}

.success-modal-content {
  background: white;
  padding: var(--space-2xl);
  border-radius: var(--radius-2xl);
  text-align: center;
  max-width: 400px;
  width: 100%;
  box-shadow: var(--shadow-xl);
  transform: scale(0.9);
  transition: var(--transition-normal);
}

.success-modal.show .success-modal-content {
  transform: scale(1);
}

.success-icon {
  width: 60px;
  height: 60px;
  background: var(--success-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-lg);
  font-size: 1.5rem;
  color: white;
}

.success-modal h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-800);
  margin-bottom: var(--space-sm);
}

.success-modal p {
  color: var(--gray-600);
  margin-bottom: var(--space-xl);
}

/* Tablet Styles */
@media (min-width: 768px) {
  .modern-login-body {
    padding: var(--space-xl);
  }
  
  .login-main {
    max-width: 900px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
  }
  
  .login-container {
    display: contents;
  }
  
  .login-header {
    padding: var(--space-2xl);
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: var(--ai-gradient);
    position: relative;
  }
  
  .login-header::before {
    opacity: 0.3;
  }
  
  .login-title {
    font-size: 2.25rem;
    margin-bottom: var(--space-md);
  }
  
  .login-subtitle {
    font-size: 1.125rem;
    max-width: none;
  }
  
  .login-form-wrapper {
    padding: var(--space-2xl);
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
}

/* Desktop Styles */
@media (min-width: 1024px) {
  .login-main {
    max-width: 1000px;
  }
  
  .login-header {
    padding: var(--space-2xl) 3rem;
  }
  
  .login-form-wrapper {
    padding: var(--space-2xl) 3rem;
  }
  
  .login-title {
    font-size: 2.5rem;
  }
  
  .login-subtitle {
    font-size: 1.25rem;
  }
}

/* Very Small Screens */
@media (max-width: 360px) {
  .modern-login-body {
    padding: var(--space-sm);
  }
  
  .login-header {
    padding: var(--space-xl) var(--space-lg);
  }
  
  .login-form-wrapper {
    padding: var(--space-xl) var(--space-lg);
  }
  
  .login-title {
    font-size: 1.5rem;
  }
  
  .login-subtitle {
    font-size: 0.875rem;
  }
  
  .form-input {
    padding: 0.875rem var(--space-md);
    font-size: 1rem;
  }
  
  .login-btn {
    padding: 0.875rem var(--space-lg);
  }
}

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

@media (prefers-color-scheme: dark) {
  :root {
    --gray-50: var(--gray-900);
    --gray-100: var(--gray-800);
    --gray-200: var(--gray-700);
    --gray-800: var(--gray-200);
    --gray-900: var(--gray-100);
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  .form-input {
    border-width: 3px;
  }
  
  .login-btn {
    border: 2px solid var(--primary-dark);
  }
}