:root {
  --bg: #f4f5f7; --card: #fff; --ink: #1c1e21; --dim: #6b7280;
  --line: #e2e5ea; --accent: #2563eb; --ok: #157f3d; --bad: #b42318;
  --work: #92610a; --warn-bg: #fff7e6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a; --card: #1c1f24; --ink: #e8eaed; --dim: #9aa1ab;
    --line: #2c3037; --accent: #6ea8fe; --ok: #58c98a; --bad: #ff8a7a;
    --work: #e0b458; --warn-bg: #2a2418;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 15px/1.5 -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
body.center { display: grid; place-items: center; min-height: 100vh; }
header {
  display: flex; flex-wrap: wrap; gap: 16px; align-items: baseline;
  padding: 14px 20px; background: var(--card); border-bottom: 1px solid var(--line);
}
.brand { font-weight: 650; text-decoration: none; color: var(--ink); }
nav { margin-left: auto; display: flex; gap: 16px; }
nav a { color: var(--dim); text-decoration: none; }
nav a:hover { color: var(--accent); }
main { max-width: 1080px; margin: 0 auto; padding: 20px 16px 60px; }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 20px; margin-bottom: 16px;
}
.card.login { width: min(360px, 92vw); }
h1 { font-size: 20px; margin: 0 0 12px; }
h2 { font-size: 16px; margin: 0 0 10px; }
.hint { color: var(--dim); font-size: 13px; }
.opt { color: var(--dim); font-weight: 400; font-size: 13px; }
.good { color: var(--ok); font-weight: 600; }
.bad { color: var(--bad); font-weight: 600; }
code { background: var(--bg); padding: 1px 5px; border-radius: 5px; }

label { display: block; margin: 14px 0; font-weight: 600; font-size: 14px; }
label.file { font-weight: 600; }
input, textarea {
  display: block; width: 100%; margin-top: 6px; padding: 9px 11px;
  font: inherit; color: var(--ink); background: var(--bg);
  border: 1px solid var(--line); border-radius: 8px;
}
textarea { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; resize: vertical; }
input[type=file] { padding: 8px; }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 640px) { .two { grid-template-columns: 1fr; } }

button, .btn {
  font: inherit; padding: 10px 16px; border-radius: 8px; cursor: pointer;
  border: 1px solid var(--line); background: var(--bg); color: var(--ink);
  text-decoration: none; display: inline-block;
}
button:hover, .btn:hover { border-color: var(--accent); }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
button:disabled { opacity: .5; cursor: default; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 14px; }

.badge {
  display: inline-block; padding: 3px 10px; border-radius: 999px;
  font-size: 13px; font-weight: 600; background: var(--bg);
}
.badge.ok { color: var(--ok); } .badge.bad { color: var(--bad); }
.badge.work { color: var(--work); background: var(--warn-bg); }
.counts { margin: 10px 0; color: var(--dim); }
.counts b { color: var(--ink); font-size: 17px; }
.summary {
  background: var(--warn-bg); border: 1px solid var(--line);
  border-radius: 8px; padding: 10px 12px; font-weight: 600;
}

.scroll { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { text-align: left; padding: 7px 10px; border-bottom: 1px solid var(--line); }
th { color: var(--dim); font-weight: 600; white-space: nowrap; }
td.num, th.num { text-align: right; white-space: nowrap; }
td a { color: var(--accent); }
.mono, td.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

.sample { margin: 14px 0; border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; }
.sample summary { cursor: pointer; font-weight: 600; font-size: 14px; }
.sample summary a { margin-left: 8px; font-weight: 400; color: var(--accent); }
.sample pre {
  margin: 10px 0; padding: 10px; overflow-x: auto; background: var(--bg);
  border-radius: 6px; font: 12.5px/1.6 ui-monospace, SFMono-Regular, Menlo, monospace;
}
.problems { margin: 0 0 14px; padding-left: 20px; }
.problems li { margin: 4px 0; }

.log {
  margin: 0; max-height: 340px; overflow: auto; white-space: pre-wrap;
  background: var(--bg); border: 1px solid var(--line); border-radius: 8px;
  padding: 12px; font: 12.5px/1.55 ui-monospace, SFMono-Regular, Menlo, monospace;
}

select {
  display: block; width: 100%; margin-top: 6px; padding: 9px 11px;
  font: inherit; color: var(--ink); background: var(--bg);
  border: 1px solid var(--line); border-radius: 8px;
}

.switch {
  display: flex; gap: 10px; align-items: center; margin: 16px 0;
  padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px;
}
.switch input { width: auto; margin: 0; }
td.pickcell, th.pickcell { width: 34px; }
td.pickcell input { width: auto; margin: 0; }