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

:root {
  --bg-dark: #0a0a0f;
  --bg-card: #12121a;
  --bg-input: #1a1a24;
  --border-color: #2a2a3a;
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #606070;
  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-success: #22c55e;
  --accent-warning: #f59e0b;
  --accent-danger: #ef4444;
  --gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

.nav {
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.logo-img {
  height: 22px;
  width: auto;
}

.logo-subtitle {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}

.hero {
  min-height: 100vh;
  background: radial-gradient(ellipse at top, #1a1a2e 0%, var(--bg-dark) 50%);
}

.hero-content {
  max-width: 700px;
  margin: 0 auto;
  padding: 4rem 2rem;
  text-align: center;
}

.badge {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 50px;
  font-size: 0.875rem;
  color: var(--accent-primary);
  margin-bottom: 1.5rem;
}

h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.audit-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2rem;
  max-width: 500px;
  margin: 0 auto 1.5rem;
}

.form-group {
  margin-bottom: 1.5rem;
  text-align: left;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

.input-wrapper {
  display: flex;
  align-items: center;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  transition: border-color 0.2s;
}

.input-wrapper:focus-within {
  border-color: var(--accent-primary);
}

.input-prefix {
  padding: 0 0.75rem;
  color: var(--text-muted);
  font-size: 0.875rem;
  background: rgba(255, 255, 255, 0.03);
  border-right: 1px solid var(--border-color);
  height: 48px;
  display: flex;
  align-items: center;
}

.input-wrapper input {
  flex: 1;
  padding: 0.875rem 1rem;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1rem;
  outline: none;
}

.input-wrapper input::placeholder {
  color: var(--text-muted);
}

select {
  width: 100%;
  padding: 0.875rem 1rem;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 1rem;
  outline: none;
  cursor: pointer;
  transition: border-color 0.2s;
}

select:focus {
  border-color: var(--accent-primary);
}

select option {
  background: var(--bg-card);
}

.btn-primary {
  width: 100%;
  padding: 1rem 2rem;
  background: var(--gradient);
  border: none;
  border-radius: 8px;
  color: white;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 40px rgba(99, 102, 241, 0.3);
}

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

.disclaimer {
  font-size: 0.75rem;
  color: var(--text-muted);
  max-width: 400px;
  margin: 0 auto;
}

.features {
  padding: 6rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.features h2 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 3rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  transition: border-color 0.2s, transform 0.2s;
}

.feature-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-4px);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer {
  padding: 3rem 2rem;
  text-align: center;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.875rem;
}

.footer .powered-by {
  margin-top: 0.75rem;
  font-size: 0.8rem;
}

.footer .powered-by a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color 0.2s;
}

.footer .powered-by a:hover {
  color: var(--accent-secondary);
  text-decoration: underline;
}

@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }
  
  .subtitle {
    font-size: 1rem;
  }
  
  .hero-content {
    padding: 2rem 1rem;
  }
  
  .audit-form {
    padding: 1.5rem;
  }
}