:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --secondary: #0ea5e9;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --dark: #1e293b;
  --light: #f8fafc;
  --gray: #64748b;
  --border: #e2e8f0;
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  line-height: 1.6;
  color: var(--dark);
  background: var(--light);
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

.header {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  padding: 40px 0;
  text-align: center;
}
.header h1 { font-size: 2.2rem; margin-bottom: 10px; }
.subtitle { font-size: 1.1rem; opacity: 0.95; }

.audit-form {
  background: white;
  padding: 30px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  margin: 30px auto;
  max-width: 700px;
}
.input-group {
  display: flex;
  gap: 10px;
  margin: 15px 0;
  flex-wrap: wrap;
}
.input-group input {
  flex: 1;
  min-width: 200px;
  padding: 14px;
  border: 2px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
}
.input-group input:focus { outline: none; border-color: var(--primary); }
button {
  padding: 14px 24px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}
button:hover { background: var(--primary-dark); }
button:disabled { background: var(--gray); cursor: not-allowed; }
.hint { font-size: 0.9rem; color: var(--gray); margin-top: 10px; }

.hidden { display: none; }

#loading { text-align: center; padding: 40px; }
.spinner {
  width: 40px; height: 40px;
  border: 4px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 20px;
}
@keyframes spin { to { transform: rotate(360deg); } }

#results {
  background: white;
  padding: 30px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  margin: 30px auto;
  max-width: 900px;
}
.score-card {
  text-align: center;
  padding: 20px;
  background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
  border-radius: 10px;
  margin-bottom: 25px;
}
.score-bar {
  height: 20px;
  background: var(--border);
  border-radius: 10px;
  margin: 15px 0;
  overflow: hidden;
}
.score-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--success), var(--primary));
  border-radius: 10px;
  width: 0%;
  transition: width 0.8s ease;
}
#scoreLabel { font-weight: 600; color: var(--gray); }

.recommendations { margin: 25px 0; }
.recommendations h3 {
  margin: 20px 0 10px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border);
  color: var(--dark);
}
.recommendations ul { list-style: none; padding-left: 0; }
.recommendations li {
  padding: 8px 0 8px 28px;
  position: relative;
  margin-bottom: 6px;
}
.recommendations li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: bold;
  font-size: 1.4rem;
  top: -3px;
}
#improvements li::before { content: "⚠️"; font-size: 1rem; }
#positives li::before { content: "✅"; font-size: 1rem; }
#tips li::before { content: "💡"; font-size: 1rem; }

.cta-section {
  background: linear-gradient(135deg, #eff6ff, #dbeafe);
  padding: 25px;
  border-radius: 10px;
  text-align: center;
  margin-top: 30px;
}
.cta-section h3 { margin-bottom: 10px; }
.btn-primary {
  display: inline-block;
  margin: 10px 5px;
  padding: 12px 28px;
  background: var(--success);
  color: white;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
}
.btn-primary:hover { background: #059669; }
.btn-secondary { background: var(--gray); margin: 10px 5px; }
.btn-secondary:hover { background: #475569; }

.features { margin: 50px auto; text-align: center; }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 25px;
}
.feature {
  background: white;
  padding: 25px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  text-align: left;
}
.feature h4 { margin: 0 0 10px; color: var(--primary); }

.footer {
  text-align: center;
  padding: 30px;
  color: var(--gray);
  font-size: 0.9rem;
  border-top: 1px solid var(--border);
  margin-top: 40px;
}

@media (max-width: 600px) {
  .input-group { flex-direction: column; }
  .header h1 { font-size: 1.8rem; }
}