:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #1b1f24;
  --muted: #5b6573;
  --line: #d9dee5;
  --accent: #2b5fd9;
  --accent-text: #ffffff;
  --ok: #17794a;
  --bad: #b3261e;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171b;
    --card: #1d2228;
    --text: #e8ebef;
    --muted: #9aa5b3;
    --line: #333b45;
    --accent: #6c93f0;
    --accent-text: #0e1218;
    --ok: #5fcf9a;
    --bad: #ff8a80;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 30rem; margin: 0 auto; padding: 2rem 1rem 4rem; }
header { margin-bottom: 1.5rem; }
h1 { margin: 0; font-size: 1.75rem; letter-spacing: 0.02em; }
h2 { margin: 0 0 0.5rem; font-size: 1.1rem; }
.muted { color: var(--muted); }
.mono { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: 0.9rem; }
.big { font-size: 1.25rem; font-weight: 600; }
small { display: block; margin-top: 0.25rem; font-size: 0.85rem; }
code { font-family: ui-monospace, Consolas, monospace; }

.card, form:not(.inline):not([hidden]) {
  display: block;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
}
.row { display: flex; justify-content: space-between; align-items: center; gap: 1rem; }

.tabs { display: flex; gap: 0.25rem; margin-bottom: 1rem; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.tabs button {
  background: none; border: none; border-bottom: 2px solid transparent;
  padding: 0.6rem 0.75rem; color: var(--muted); font: inherit; cursor: pointer;
}
.tabs button[aria-selected="true"] { color: var(--text); border-bottom-color: var(--accent); }

label { display: block; margin-bottom: 0.9rem; font-weight: 500; }
input {
  display: block; width: 100%; margin-top: 0.25rem; padding: 0.6rem 0.7rem;
  background: var(--card); color: var(--text); border: 1px solid var(--line);
  border-radius: 8px; font: inherit;
}
input:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
fieldset { border: 1px solid var(--line); border-radius: 10px; margin: 0 0 1rem; padding: 0.75rem 1rem; }
legend { padding: 0 0.4rem; color: var(--muted); }

button {
  font: inherit; padding: 0.55rem 1rem; border-radius: 8px; cursor: pointer;
  background: var(--card); color: var(--text); border: 1px solid var(--line);
}
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); font-weight: 600; }
a.btn {
  display: block;
  padding: 0.6rem 0.9rem;
  text-align: center;
  text-decoration: none;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
}
a.btn:hover { border-color: var(--accent); }
#google-wrap { margin: 1rem 0 0; }
button:disabled { opacity: 0.6; cursor: progress; }

form.inline { display: flex; gap: 0.5rem; margin-bottom: 0.4rem; }
form.inline input { margin-top: 0; }

ul.plain { list-style: none; margin: 0 0 0.75rem; padding: 0; }
ul.plain li {
  display: flex; justify-content: space-between; align-items: center; gap: 0.75rem;
  padding: 0.5rem 0; border-bottom: 1px solid var(--line);
}
ul.plain li:last-child { border-bottom: none; }
.tag { font-size: 0.8rem; padding: 0.1rem 0.5rem; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); }
.tag.ok { color: var(--ok); border-color: var(--ok); }

pre { background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 0.75rem; white-space: pre-wrap; }

#msg { padding: 0.7rem 1rem; border-radius: 8px; margin-bottom: 1rem; border: 1px solid var(--line); background: var(--card); }
#msg.ok { color: var(--ok); border-color: var(--ok); }
#msg.bad { color: var(--bad); border-color: var(--bad); }
.brand-foot { margin-top: 2rem; font-size: 0.85rem; text-align: center; }