:root {
  --bg: #f3f4f6;
  --card: #ffffff;
  --text: #111827;
  --muted: #4b5563;
  --accent: #0f766e;
  --accent-hover: #115e59;
  --error: #b91c1c;
  --border: #d1d5db;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, sans-serif;
  background: radial-gradient(circle at top left, #e0f2fe, var(--bg));
  color: var(--text);
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.card {
  width: min(760px, 100%);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.08);
}

h1 {
  margin: 0 0 10px;
}

h2 {
  margin: 0;
  font-size: 20px;
}

.hint {
  margin: 0 0 14px;
  color: var(--muted);
}

textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  resize: vertical;
  min-height: 220px;
}

button {
  margin-top: 12px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 10px;
  padding: 10px 16px;
  font-size: 15px;
  cursor: pointer;
}

button:hover {
  background: var(--accent-hover);
}

.error {
  min-height: 24px;
  margin-top: 12px;
  color: var(--error);
}

.result {
  margin-top: 8px;
  display: grid;
  gap: 6px;
}

.hidden {
  display: none;
}

.divider {
  margin: 22px 0;
  border: none;
  border-top: 1px solid var(--border);
}

.inline-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.field {
  display: grid;
  gap: 6px;
  font-size: 14px;
  color: var(--muted);
}

.field input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 15px;
  color: var(--text);
}

@media (max-width: 640px) {
  .inline-fields {
    grid-template-columns: 1fr;
  }
}

.verdict-low {
  color: #b91c1c;
}

.verdict-normal {
  color: #a16207;
}

.verdict-high {
  color: #15803d;
}