:root {
  --bg: #f5f6f8; --card: #fff; --text: #1b1f24; --muted: #5f6b7a; --border: #dde2e8;
  --accent: #0a7c66; --huawei: #cf0a2c; --err: #b42318; --warn: #a15c07; --ok: #067647;
  --z1: #8ab4f8; --z2: #5bb974; --z3: #fbbc04; --z4: #f28b30; --z5: #d93025;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #111418; --card: #1a1e24; --text: #e6e9ed; --muted: #9aa5b1; --border: #2c323a;
          --accent: #3cc3a4; --err: #f97066; --warn: #fdb022; --ok: #47cd89; }
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; background: var(--bg); color: var(--text); }
.top { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between;
       padding: 14px 16px; border-bottom: 1px solid var(--border); background: var(--card); }
h1 { margin: 0; font-size: 20px; } h1 span { color: var(--accent); }
h2 { font-size: 16px; margin: 0 0 4px; } h3 { font-size: 14px; margin: 16px 0 8px; }
small { color: var(--muted); font-weight: normal; }
#account { display: flex; gap: 8px; align-items: center; }
#account form { margin: 0; }
main { max-width: 760px; margin: 0 auto; padding: 16px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 16px; margin-bottom: 14px; }
.hint { color: var(--muted); margin: 0 0 12px; font-size: 14px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; font-weight: 600; }
input, select, textarea { font: inherit; padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px;
  background: var(--bg); color: var(--text); width: 100%; }
textarea { font-family: ui-monospace, monospace; font-size: 13px; margin-top: 8px; }
details { margin-top: 12px; } summary { cursor: pointer; color: var(--muted); font-size: 14px; }
.btn { display: inline-block; font: inherit; font-weight: 600; padding: 8px 14px; border-radius: 6px; border: 1px solid transparent;
       cursor: pointer; text-decoration: none; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: #fff; margin-top: 8px; }
.btn-huawei { background: var(--huawei); color: #fff; }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--text); }
.pill { font-size: 13px; padding: 3px 10px; border-radius: 99px; border: 1px solid var(--border); color: var(--muted); }
.pill.on { color: var(--ok); border-color: currentColor; }
.banner { padding: 10px 14px; border-radius: 8px; margin-bottom: 14px; border: 1px solid currentColor; }
.banner.err { color: var(--err); } .banner.ok { color: var(--ok); }
.issues { list-style: none; padding: 0; margin: 0 0 8px; }
.issues li { padding: 4px 0 4px 22px; position: relative; font-size: 14px; }
.issues li::before { position: absolute; left: 0; }
.issues .err { color: var(--err); } .issues .err::before { content: "✕"; }
.issues .warn { color: var(--warn); } .issues .warn::before { content: "!"; font-weight: 700; left: 5px; }
.issues .ok { color: var(--ok); } .issues .ok::before { content: "✓"; }
.zone { display: grid; grid-template-columns: 150px 1fr 64px; gap: 8px; align-items: center; font-size: 13px; margin-bottom: 6px; }
.zone .track { background: var(--bg); border-radius: 4px; height: 14px; overflow: hidden; }
.zone .fill { height: 100%; border-radius: 4px; }
.zone .t { text-align: right; font-variant-numeric: tabular-nums; color: var(--muted); }
@media (max-width: 480px) { .zone { grid-template-columns: 110px 1fr 56px; } }