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

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: #f5f5f0;
  color: #1a1a1a;
  min-height: 100vh;
  padding: 2rem 1rem;
}

main {
  max-width: 640px;
  margin: 0 auto;
}

h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.subtitle {
  color: #666;
  font-size: 0.875rem;
  margin-top: 0.25rem;
  margin-bottom: 2rem;
}

#form {
  background: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 12px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

label {
  font-size: 0.875rem;
  font-weight: 500;
  color: #444;
}

.hint {
  font-weight: 400;
  color: #999;
}

input {
  border: 1px solid #d0d0d0;
  border-radius: 8px;
  padding: 0.625rem 0.75rem;
  font-size: 1rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
  text-transform: lowercase;
}

input:focus {
  border-color: #4a6cf7;
  box-shadow: 0 0 0 3px rgba(74, 108, 247, 0.12);
}

button {
  background: #4a6cf7;
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 0.75rem;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s;
  margin-top: 0.25rem;
}

button:hover { background: #3a5ce5; }
button:active { background: #2a4cd3; }
button:disabled { background: #a0a0a0; cursor: default; }

#status {
  margin-top: 1.5rem;
  font-size: 0.875rem;
  color: #666;
  min-height: 1.25rem;
}

#results {
  margin-top: 0.5rem;
}

.group {
  margin-bottom: 1.25rem;
}

.group-header {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #888;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid #e8e8e8;
  margin-bottom: 0.625rem;
}

.word-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
}

.word {
  background: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 6px;
  padding: 0.25rem 0.625rem;
  font-size: 0.9375rem;
  font-family: ui-monospace, monospace;
}