:root {
  --primary: #4361ee;
  --danger: #f72585;
  --light: #f8f9fa;
  --dark: #212529;
  --gray: #6c757d;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--light);
  color: var(--dark);
  line-height: 1.6;
  padding: 20px;
  max-width: 800px;
  margin: 0 auto;
}

h1 {
  text-align: center;
  margin: 0.8em 0;
  color: var(--primary);
}

.container {
  background: white;
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  margin-bottom: 20px;
}

input, button {
  width: 100%;
  padding: 14px;
  margin: 10px 0;
  border: 1px solid #ddd;
  border-radius: 10px;
  font-size: 18px;
}

input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
}

button {
  background-color: var(--primary);
  color: white;
  border: none;
  font-weight: 600;
  cursor: pointer;
}

button:hover { background-color: #3a56d4; }

.success { background-color: #d1f0ff; color: var(--primary); padding: 12px; border-radius: 10px; text-align: center; margin: 16px 0; }
.danger { background-color: #ffebee; color: var(--danger); padding: 12px; border-radius: 10px; text-align: center; margin: 16px 0; }

table { width: 100%; border-collapse: collapse; margin-top: 16px; }
th, td { padding: 12px 10px; text-align: left; border-bottom: 1px solid #eee; }
th { background-color: #f1f5ff; color: var(--primary); }

.matched { background-color: #fff0f5; }
footer { text-align: center; margin-top: 30px; color: var(--gray); font-size: 14px; }

@media (max-width: 600px) {
  .container { padding: 16px; }
  input, button { padding: 12px; font-size: 16px; }
}