:root {
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --secondary-color: #8b5cf6;
  --background: #0f172a;
  --surface: #1e293b;
  --surface-light: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --border-radius: 12px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: linear-gradient(135deg, var(--background) 0%, #1a1f3a 100%);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

header {
  text-align: center;
  padding: 3rem 2rem;
  background: linear-gradient(180deg, rgba(99, 102, 241, 0.1) 0%, transparent 100%);
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.logo svg {
  width: 48px;
  height: 48px;
}

h1 {
  font-size: 3rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  /* margin-bottom: 1rem; */
}

.subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.keyword-highlight {
  color: var(--primary-color);
  font-weight: 600;
}

.card {
  background: var(--surface);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  margin-bottom: 2rem;
  border: 1px solid rgba(99, 102, 241, 0.2);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 40px rgba(99, 102, 241, 0.2);
}

.email-generator {
  text-align: center;
}

.email-display {
  background: var(--background);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  margin: 1.5rem 0;
  border: 2px solid var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.email-address {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary-color);
  word-break: break-all;
  flex: 1;
  min-width: 200px;
}

.btn {
  padding: 0.875rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
}

.btn-secondary {
  background: var(--surface-light);
  color: var(--text-primary);
  border: 1px solid var(--primary-color);
}

.btn-secondary:hover {
  background: var(--primary-color);
  transform: translateY(-2px);
}

.inbox {
  min-height: 300px;
}

.inbox-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.inbox-header h2 {
  font-size: 1.5rem;
  color: var(--text-primary);
}

.email-list {
  list-style: none;
}

.email-item {
  background: var(--background);
  padding: 1.25rem;
  border-radius: var(--border-radius);
  margin-bottom: 1rem;
  border-left: 4px solid var(--primary-color);
  cursor: pointer;
  transition: all 0.3s ease;
}

.email-item:hover {
  background: var(--surface-light);
  transform: translateX(5px);
}

.email-meta {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  flex-wrap: wrap;
  gap: 0.5rem;
}

.email-subject {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.email-preview {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.empty-state {
  text-align: center;
  padding: 3rem;
  color: var(--text-secondary);
}

.empty-state svg {
  width: 64px;
  height: 64px;
  margin-bottom: 1rem;
  opacity: 0.5;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

.feature-card {
  background: var(--surface);
  padding: 2rem;
  border-radius: var(--border-radius);
  text-align: center;
  border: 1px solid rgba(99, 102, 241, 0.1);
  transition: all 0.3s ease;
}

.feature-card:hover {
  border-color: var(--primary-color);
  transform: translateY(-5px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 1rem;
  color: var(--primary-color);
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

footer {
  text-align: center;
  padding: 2rem;
  margin-top: 4rem;
  border-top: 1px solid var(--surface-light);
  color: var(--text-secondary);
}

.seo-section {
  background: var(--surface);
  border-radius: var(--border-radius);
  padding: 2rem;
  margin: 2rem 0;
  line-height: 1.8;
}

.seo-section h2 {
  color: var(--primary-color);
  margin-bottom: 1rem;
  font-size: 1.75rem;
}

.seo-section p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 0.8s linear infinite;
}

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

@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
  
  .subtitle {
    font-size: 1rem;
  }
  
  .card {
    padding: 1.5rem;
  }
  
  .email-display {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }
}