/* Authentication Page Styles - Matching Landing Page Design */

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

:root {
  /* Professional Color Palette */
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #dbeafe;
  
  /* Neutral Grays */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-900: #111827;
  
  /* Accents */
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  color: var(--gray-900);
  background: linear-gradient(135deg, var(--gray-50) 0%, var(--primary-light) 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

/* ============================================
   Auth Container
   ============================================ */
.auth-container {
  width: 100%;
  max-width: 440px;
  background: white;
  border-radius: 16px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  overflow: hidden;
}

.auth-header {
  text-align: center;
  padding: 48px 32px 32px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
}

.auth-logo {
  font-size: 48px;
  margin-bottom: 12px;
}

.auth-title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
}

.auth-subtitle {
  font-size: 16px;
  opacity: 0.9;
}

/* ============================================
   Tabs
   ============================================ */
.auth-tabs {
  display: flex;
  border-bottom: 2px solid var(--gray-200);
  background: white;
}

.tab-button {
  flex: 1;
  padding: 16px;
  background: none;
  border: none;
  font-size: 16px;
  font-weight: 600;
  color: var(--gray-600);
  cursor: pointer;
  transition: all 0.3s;
  position: relative;
}

.tab-button.active {
  color: var(--primary);
}

.tab-button.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary);
}

.tab-button:hover {
  color: var(--primary);
  background: var(--gray-50);
}

/* ============================================
   Forms
   ============================================ */
.auth-content {
  padding: 32px;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.3s ease-in;
}

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

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--gray-700);
  font-size: 14px;
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--gray-200);
  border-radius: 8px;
  font-size: 16px;
  transition: all 0.2s;
}

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

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

/* ============================================
   Buttons
   ============================================ */
.btn {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-primary:disabled {
  background: var(--gray-300);
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: var(--gray-100);
  color: var(--gray-700);
}

.btn-secondary:hover {
  background: var(--gray-200);
}

/* ============================================
   Links & Messages
   ============================================ */
.form-link {
  display: block;
  margin-top: 16px;
  text-align: center;
  color: var(--primary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
}

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

.message {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-size: 14px;
  animation: slideDown 0.3s ease-out;
}

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

.message.success {
  background: #d1fae5;
  color: #065f46;
  border: 1px solid #10b981;
}

.message.error {
  background: #fee2e2;
  color: #991b1b;
  border: 1px solid #ef4444;
}

/* ============================================
   Modal
   ============================================ */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal.active {
  display: flex;
  animation: fadeIn 0.2s ease-out;
}

.modal-content {
  background: white;
  border-radius: 16px;
  padding: 32px;
  max-width: 400px;
  width: 100%;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.modal-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--gray-900);
}

.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--gray-600);
  padding: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  transition: all 0.2s;
}

.modal-close:hover {
  background: var(--gray-100);
  color: var(--gray-900);
}

/* ============================================
   Back Link
   ============================================ */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: white;
  text-decoration: none;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 8px;
  transition: all 0.2s;
  position: absolute;
  top: 24px;
  left: 24px;
}

.back-link:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* ============================================
   Loading State
   ============================================ */
.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* ============================================
   Legal Notice
   ============================================ */
.legal-notice {
  margin-top: 16px;
  padding: 12px;
  background: var(--gray-100);
  border-radius: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--gray-600);
  text-align: center;
}

.legal-notice a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
}

.legal-notice a:hover {
  text-decoration: underline;
}

/* ============================================
   Checkbox Groups
   ============================================ */
.checkbox-group {
  margin-top: 16px;
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}

.checkbox-label input[type="checkbox"] {
  margin-top: 3px;
  width: 18px;
  height: 18px;
  cursor: pointer;
  flex-shrink: 0;
  accent-color: var(--primary);
}

.checkbox-text {
  font-size: 14px;
  line-height: 1.6;
  color: var(--gray-700);
}

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

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

.required-asterisk {
  color: #ef4444;
  font-weight: bold;
  margin-left: 2px;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
  body {
    padding: 16px;
  }

  .auth-container {
    max-width: 100%;
  }

  .auth-header {
    padding: 32px 24px 24px;
  }

  .auth-title {
    font-size: 24px;
  }

  .auth-content {
    padding: 24px;
  }

  .back-link {
    top: 16px;
    left: 16px;
  }
  
  .checkbox-text {
    font-size: 13px;
  }
}