/* Login & Register Page - Modern Design */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', sans-serif;
  min-height: 100vh;
  background: #f5f7fa;
}

/* Main Container */
.auth-container {
  display: flex;
  min-height: 100vh;
}

/* Left Side - Branding */
.auth-branding {
  flex: 1;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px;
  position: relative;
  overflow: hidden;
}

.branding-content {
  position: relative;
  z-index: 2;
  color: #fff;
  max-width: 500px;
}

.brand-logo img {
  height: 60px;
  margin-bottom: 40px;
  filter: brightness(0) invert(1);
}

.branding-content h1 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.3;
}

.branding-content p {
  font-size: 16px;
  opacity: 0.9;
  line-height: 1.6;
  margin-bottom: 40px;
}

.brand-features {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
}

.feature-item i {
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.2);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}

/* Decorative Circles */
.branding-decoration {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
}

.circle {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
}

.circle-1 {
  width: 400px;
  height: 400px;
  top: -100px;
  right: -100px;
}

.circle-2 {
  width: 300px;
  height: 300px;
  bottom: -50px;
  left: -50px;
}

.circle-3 {
  width: 200px;
  height: 200px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

/* Right Side - Forms */
.auth-forms {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px;
  background: #fff;
}

.auth-card {
  width: 100%;
  max-width: 440px;
}

/* Tab Switcher */
.auth-tabs {
  display: flex;
  background: #f5f7fa;
  border-radius: 12px;
  padding: 6px;
  margin-bottom: 32px;
  position: relative;
}

.auth-tab {
  flex: 1;
  padding: 14px 24px;
  border: none;
  background: transparent;
  font-size: 15px;
  font-weight: 600;
  color: #6b7280;
  cursor: pointer;
  border-radius: 8px;
  transition: all 0.3s ease;
  position: relative;
  z-index: 2;
}

.auth-tab.active {
  color: #667eea;
}

.tab-indicator {
  position: absolute;
  top: 6px;
  left: 6px;
  width: calc(50% - 6px);
  height: calc(100% - 12px);
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.auth-tabs .auth-tab:last-child.active ~ .tab-indicator,
.auth-tab[data-tab="register"].active ~ .tab-indicator {
  left: calc(50%);
}

/* Forms */
.auth-form {
  display: none;
  animation: fadeIn 0.3s ease;
}

.auth-form.active {
  display: block;
}

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

.form-header {
  text-align: center;
  margin-bottom: 32px;
}

.form-header h2 {
  font-size: 28px;
  font-weight: 700;
  color: #1f2937;
  margin-bottom: 8px;
}

.form-header p {
  color: #6b7280;
  font-size: 15px;
}

/* Form Groups */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: #374151;
  margin-bottom: 8px;
}

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

.input-wrapper i:first-child {
  position: absolute;
  left: 16px;
  color: #9ca3af;
  font-size: 16px;
  transition: color 0.3s;
}

.input-wrapper input {
  width: 100%;
  padding: 14px 16px 14px 48px;
  border: 2px solid #e5e7eb;
  border-radius: 12px;
  font-size: 15px;
  font-family: inherit;
  transition: all 0.3s ease;
  background: #fff;
}

.input-wrapper input:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.input-wrapper input:focus + i:first-child,
.input-wrapper:focus-within i:first-child {
  color: #667eea;
}

.input-wrapper input::placeholder {
  color: #9ca3af;
}

/* Toggle Password */
.toggle-password {
  position: absolute;
  right: 16px;
  background: none;
  border: none;
  color: #9ca3af;
  cursor: pointer;
  padding: 4px;
  transition: color 0.3s;
}

.toggle-password:hover {
  color: #667eea;
}

/* Password Strength */
.password-strength {
  margin-top: 8px;
  height: 4px;
  border-radius: 2px;
  background: #e5e7eb;
  overflow: hidden;
}

.password-strength::after {
  content: '';
  display: block;
  height: 100%;
  width: 0;
  transition: all 0.3s;
}

.password-strength.weak::after {
  width: 33%;
  background: #ef4444;
}

.password-strength.medium::after {
  width: 66%;
  background: #f59e0b;
}

.password-strength.strong::after {
  width: 100%;
  background: #10b981;
}

/* Form Options */
.form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}

/* Custom Checkbox */
.checkbox-wrapper {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
  font-size: 14px;
  color: #4b5563;
}

.checkbox-wrapper input {
  display: none;
}

.checkmark {
  width: 20px;
  height: 20px;
  min-width: 20px;
  border: 2px solid #d1d5db;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.checkbox-wrapper input:checked + .checkmark {
  background: #667eea;
  border-color: #667eea;
}

.checkbox-wrapper input:checked + .checkmark::after {
  content: '✓';
  color: #fff;
  font-size: 12px;
  font-weight: 700;
}

.checkbox-wrapper a {
  color: #667eea;
  text-decoration: none;
}

.checkbox-wrapper a:hover {
  text-decoration: underline;
}

.forgot-link {
  color: #667eea;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
}

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

/* Error & Success Messages */
.error-message {
  background: #fef2f2;
  color: #dc2626;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 14px;
  margin-bottom: 16px;
  display: none;
  align-items: center;
  gap: 10px;
}

.error-message.show {
  display: flex;
}

.error-message::before {
  content: '⚠️';
}

.success-message {
  background: #ecfdf5;
  color: #059669;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 14px;
  margin-bottom: 16px;
  display: none;
  align-items: center;
  gap: 10px;
}

.success-message.show {
  display: flex;
}

.success-message::before {
  content: '✅';
}

/* Submit Button */
.btn-submit {
  width: 100%;
  padding: 16px 24px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.btn-submit::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.btn-submit:hover::before {
  left: 100%;
}

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

/* Divider */
.divider {
  display: flex;
  align-items: center;
  margin: 28px 0;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: #e5e7eb;
}

.divider span {
  padding: 0 16px;
  color: #9ca3af;
  font-size: 13px;
}

/* Social Login */
.social-login {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
}

.btn-social {
  flex: 1;
  padding: 12px 16px;
  border: 2px solid #e5e7eb;
  border-radius: 10px;
  background: #fff;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: all 0.3s ease;
}

.btn-social:hover {
  border-color: #d1d5db;
  background: #f9fafb;
}

.btn-social.google i {
  color: #ea4335;
}

.btn-social.facebook i {
  color: #1877f2;
}

/* Switch Form Link */
.switch-form {
  text-align: center;
  color: #6b7280;
  font-size: 14px;
}

.switch-form a {
  color: #667eea;
  text-decoration: none;
  font-weight: 600;
}

.switch-form a:hover {
  text-decoration: underline;
}

/* Back Home Link */
.back-home {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 32px;
  color: #6b7280;
  text-decoration: none;
  font-size: 14px;
  transition: color 0.3s;
}

.back-home:hover {
  color: #667eea;
}

/* Form Row */
.form-row {
  display: flex;
  gap: 16px;
}

.form-row .form-group {
  flex: 1;
}


/* Responsive Design */
@media (max-width: 1024px) {
  .auth-branding {
    display: none;
  }
  
  .auth-forms {
    padding: 24px;
  }
}

@media (max-width: 480px) {
  .auth-card {
    padding: 0 8px;
  }
  
  .form-header h2 {
    font-size: 24px;
  }
  
  .social-login {
    flex-direction: column;
  }
  
  .form-options {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .auth-tabs {
    margin-bottom: 24px;
  }
  
  .auth-tab {
    padding: 12px 16px;
    font-size: 14px;
  }
}

/* Loading State */
.btn-submit.loading {
  pointer-events: none;
  opacity: 0.8;
}

.btn-submit.loading span {
  visibility: hidden;
}

.btn-submit.loading::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2px solid #fff;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Input Validation States */
.input-wrapper.error input {
  border-color: #ef4444;
}

.input-wrapper.success input {
  border-color: #10b981;
}

.input-wrapper.error i:first-child {
  color: #ef4444;
}

.input-wrapper.success i:first-child {
  color: #10b981;
}

/* Shake Animation for Errors */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.shake {
  animation: shake 0.3s ease;
}