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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background: #fff;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 80px 0 120px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="2" fill="white" opacity="0.1"/></svg>');
  opacity: 0.3;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 40px;
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}

.hero-subtitle {
  font-size: 20px;
  line-height: 1.6;
  margin-bottom: 40px;
  opacity: 0.95;
  position: relative;
  z-index: 1;
}

.hero-subtitle strong {
  font-weight: 700;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: #00cc88;
  color: white;
  border: none;
  padding: 18px 36px;
  font-size: 18px;
  font-weight: 600;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 8px 20px rgba(0, 204, 136, 0.3);
  position: relative;
  z-index: 1;
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(0, 204, 136, 0.4);
  background: #00d994;
}

.cta-button:active {
  transform: translateY(0);
}

.trust-line {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
  font-size: 14px;
  opacity: 0.9;
  position: relative;
  z-index: 1;
}

/* How It Works */
.how-it-works {
  padding: 100px 0;
  background: #f8f9fa;
}

.how-it-works h2,
.features h2,
.use-cases h2,
.cta-section h2 {
  font-size: 42px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
  color: #1a202c;
}

.section-subtitle {
  text-align: center;
  font-size: 18px;
  color: #666;
  margin-bottom: 60px;
}

.steps {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 0;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
}

.step {
  background: white;
  border-radius: 16px;
  padding: 40px 32px;
  text-align: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  position: relative;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.step:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.step-number {
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
}

.step-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.step h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: #1a202c;
}

.step p {
  font-size: 15px;
  color: #666;
  line-height: 1.5;
}

.step-arrow {
  font-size: 32px;
  color: #667eea;
  font-weight: 300;
  padding: 0 16px;
}

/* Features */
.features {
  padding: 100px 0;
  background: white;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
  max-width: 1100px;
  margin: 0 auto;
}

.feature-card {
  padding: 32px;
  border-radius: 12px;
  background: #f8f9fa;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.feature-card:hover {
  background: white;
  border-color: #667eea;
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.15);
  transform: translateY(-2px);
}

.feature-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: #1a202c;
}

.feature-card p {
  font-size: 15px;
  color: #666;
  line-height: 1.6;
}

/* Use Cases */
.use-cases {
  padding: 100px 0;
  background: linear-gradient(to bottom, #f8f9fa, white);
}

.use-case-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.use-case {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  padding: 32px;
  background: white;
  border-radius: 12px;
  border-left: 4px solid #667eea;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  transition: all 0.3s ease;
}

.use-case:hover {
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
  transform: translateX(4px);
}

.use-case-icon {
  font-size: 40px;
  flex-shrink: 0;
}

.use-case-content h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
  color: #1a202c;
}

.use-case-content p {
  font-size: 15px;
  color: #666;
  line-height: 1.6;
}

/* CTA Section */
.cta-section {
  padding: 100px 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  text-align: center;
}

.cta-section h2 {
  color: white;
  margin-bottom: 12px;
}

.cta-section p {
  font-size: 20px;
  margin-bottom: 32px;
  opacity: 0.95;
}

.cta-button-secondary {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: white;
  color: #667eea;
  border: none;
  padding: 18px 36px;
  font-size: 18px;
  font-weight: 600;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 8px 20px rgba(255, 255, 255, 0.2);
}

.cta-button-secondary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(255, 255, 255, 0.3);
}

/* Footer */
footer {
  background: #1a202c;
  color: white;
  padding: 60px 0 24px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 600;
}

.footer-links {
  display: flex;
  gap: 32px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.5);
  font-size: 14px;
}

/* Responsive */
@media (max-width: 1024px) {
  .steps {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .step-arrow {
    display: none;
  }
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 40px;
  }

  .hero-subtitle {
    font-size: 18px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    flex-direction: column;
    gap: 16px;
  }
}

/* Loading State */
.loading {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.loading.active {
  opacity: 1;
  pointer-events: all;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid #f3f3f3;
  border-top: 4px solid #667eea;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Auth Modal */
.auth-modal-overlay {
  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: 10000;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.auth-modal {
  background: white;
  border-radius: 16px;
  max-width: 500px;
  width: 90%;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  animation: slideUp 0.3s ease;
}

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

.auth-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 32px;
  border-bottom: 1px solid #e5e7eb;
}

.auth-modal-header h2 {
  font-size: 24px;
  font-weight: 700;
  color: #1a202c;
  margin: 0;
}

.auth-modal-close {
  background: none;
  border: none;
  font-size: 32px;
  color: #9ca3af;
  cursor: pointer;
  padding: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s ease;
}

.auth-modal-close:hover {
  color: #1a202c;
}

.auth-modal-body {
  padding: 32px;
}

.auth-modal-body p {
  font-size: 16px;
  color: #4b5563;
  margin-bottom: 16px;
}

.domain-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  border: 2px solid #e5e7eb;
  border-radius: 8px;
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.domain-input-wrapper:focus-within {
  border-color: #667eea;
}

.domain-prefix {
  padding: 12px 0 12px 16px;
  font-size: 16px;
  color: #6b7280;
  font-weight: 500;
  background: #f9fafb;
  border-right: 1px solid #e5e7eb;
}

.domain-input {
  flex: 1;
  border: none;
  padding: 12px 16px;
  font-size: 16px;
  outline: none;
  font-family: inherit;
}

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

.domain-input.error {
  background: #fef2f2;
}

.domain-examples {
  margin-top: 12px;
  font-size: 14px;
  color: #9ca3af;
}

.domain-error {
  margin-top: 12px;
  color: #dc2626;
  font-size: 14px;
  min-height: 20px;
}

.auth-modal-footer {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  padding: 24px 32px;
  border-top: 1px solid #e5e7eb;
}

.btn-cancel,
.btn-connect {
  padding: 12px 24px;
  font-size: 16px;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  font-family: inherit;
}

.btn-cancel {
  background: #f3f4f6;
  color: #4b5563;
}

.btn-cancel:hover {
  background: #e5e7eb;
}

.btn-connect {
  background: #667eea;
  color: white;
}

.btn-connect:hover {
  background: #5568d3;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

/* Loading Overlay */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10001;
  animation: fadeIn 0.2s ease;
}

.loading-overlay .loading-spinner {
  background: white;
  padding: 48px;
  border-radius: 16px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.loading-overlay .spinner {
  width: 64px;
  height: 64px;
  border: 6px solid #f3f3f3;
  border-top: 6px solid #667eea;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 24px;
}

.loading-overlay p {
  font-size: 18px;
  font-weight: 600;
  color: #1a202c;
  margin: 0 0 8px 0;
}

.loading-overlay small {
  font-size: 14px;
  color: #6b7280;
}