/* General layout */
body {
  font-family: 'Inter', Arial, sans-serif;
  background: #f4f6f8;
  margin: 0;
  padding: 0;
}

/* Header */
header {
  background: #4f46e5;
  color: white;
  padding: 12px 0;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}
header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}
header nav ul {
  display: flex;
  gap: 20px;
  list-style: none;
}
header nav a {
  color: white;
  text-decoration: none;
  font-weight: 500;
}
header nav a:hover {
  text-decoration: underline;
}

/* Footer */
footer {
  background: #1f2937;
  color: #ccc;
  padding: 20px 0;
  margin-top: 40px;
}
footer .container {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}
footer a {
  color: #ccc;
  margin: 0 8px;
  text-decoration: none;
}
footer a:hover {
  color: white;
  text-decoration: underline;
}

/* Spinner */
.spinner {
  border: 4px solid rgba(0,0,0,0.1);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border-left-color: #4f46e5;
  animation: spin 1s linear infinite;
}
@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Form box */
.form-box {
  background: #fff;
  padding: 24px;
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.06);
}
input[type="url"], button, select {
  padding: 10px;
  border-radius: 8px;
  border: 1px solid #e0e6eb;
}
button {
  background: #4f46e5;
  color: white;
  border: none;
  cursor: pointer;
}
button:hover { background: #4338ca; }

/* Result cards */
.results-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 20px;
}
.card {
  background: #f9fafb;
  padding: 16px;
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 4px 12px rgba(0,0,0,0.03);
}
.card h3 { margin-bottom: 12px; font-size: 16px; }

/* Responsive */
@media (max-width: 800px) {
  .results-grid {
    grid-template-columns: 1fr;
  }
}