:root {
  color-scheme: light dark;
  --bg: #0f1115;
  --panel: #171a21;
  --border: #2a2e38;
  --text: #e8eaed;
  --muted: #9aa0ac;
  --accent: #4f8cff;
  --valid: #3ecf8e;
  --risky: #f2b84b;
  --invalid: #f2545b;
  --unknown: #9aa0ac;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f7f9;
    --panel: #ffffff;
    --border: #e2e5ea;
    --text: #1a1d23;
    --muted: #5b6270;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}

h1 { margin: 0 0 4px; font-size: 28px; }
.subtitle { color: var(--muted); margin: 0 0 28px; }

form {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

label { font-size: 14px; font-weight: 600; }

textarea {
  width: 100%;
  resize: vertical;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-family: ui-monospace, monospace;
  font-size: 14px;
}

.options {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 400;
  font-size: 14px;
  color: var(--muted);
}

button {
  align-self: flex-start;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

button:disabled { opacity: 0.6; cursor: not-allowed; }

.status {
  margin-top: 16px;
  color: var(--muted);
  font-size: 14px;
}

#results-wrap {
  margin-top: 24px;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

th {
  color: var(--muted);
  font-weight: 600;
  background: var(--panel);
}

tbody tr:last-child td { border-bottom: none; }

.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.badge-valid { background: color-mix(in srgb, var(--valid) 20%, transparent); color: var(--valid); }
.badge-risky { background: color-mix(in srgb, var(--risky) 20%, transparent); color: var(--risky); }
.badge-invalid { background: color-mix(in srgb, var(--invalid) 20%, transparent); color: var(--invalid); }
.badge-unknown { background: color-mix(in srgb, var(--unknown) 20%, transparent); color: var(--unknown); }