:root {
  color-scheme: light dark;
  --bg: #0e1014;
  --card: #161a22;
  --fg: #e8ecf1;
  --muted: #8a93a3;
  --border: #262c38;
  --accent: #4f8cff;
  --accent-fg: #ffffff;
  --ok: #1f9d55;
  --warn: #c79a1d;
  --err: #d24b4b;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f6f8;
    --card: #ffffff;
    --fg: #1c1f25;
    --muted: #5a6373;
    --border: #d8dde6;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 16px 64px;
}

header h1 {
  margin: 0 0 8px;
  font-size: 28px;
  letter-spacing: -0.02em;
}

header .sub {
  color: var(--muted);
  margin: 0 0 24px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  margin-bottom: 16px;
}

.card h2 {
  margin: 0 0 12px;
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  font-weight: 600;
}

.row {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 8px;
}
.row:last-child { margin-bottom: 0; }
.grow { flex: 1; }

button {
  appearance: none;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--fg);
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s, transform 0.05s;
}
button:hover:not(:disabled) { background: rgba(127, 127, 127, 0.08); }
button:active:not(:disabled) { transform: scale(0.98); }
button:disabled { opacity: 0.4; cursor: not-allowed; }

button.primary {
  background: var(--accent);
  color: var(--accent-fg);
  border-color: transparent;
}
button.primary:hover:not(:disabled) {
  background: color-mix(in srgb, var(--accent) 88%, white);
}

label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
}

label.check {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0;
  font-size: 13px;
  cursor: pointer;
}
label.check input { margin: 0; }

textarea {
  width: 100%;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  font-size: 15px;
  font-family: ui-monospace, SFMono-Regular, "Cascadia Code", "Source Code Pro", monospace;
  resize: vertical;
  margin-bottom: 12px;
}
textarea:focus {
  outline: 2px solid var(--accent);
  border-color: var(--accent);
}
textarea.masked {
  -webkit-text-security: disc;
  text-security: disc;
}

.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--muted);
}
.badge-off    { color: var(--muted); }
.badge-ok     { color: var(--ok);   border-color: var(--ok); }
.badge-warn   { color: var(--warn); border-color: var(--warn); }
.badge-err    { color: var(--err);  border-color: var(--err); }
.badge-active { color: var(--accent); border-color: var(--accent); }

.status {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.hint {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

footer {
  margin-top: 24px;
  color: var(--muted);
  font-size: 13px;
}
footer summary { cursor: pointer; }
footer ul { padding-left: 20px; }
footer li { margin-bottom: 4px; }

code {
  background: var(--card);
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
  font-size: 0.92em;
}