/* KukuBuy Tools — minimal stylesheet (system fonts, no external requests) */
:root {
  --ink: #0B1020;
  --pri: #2F5BFF;
  --pri-2: #1E44D6;
  --line: #E4E8F0;
  --line-2: #EFF2F7;
  --soft: #F6F8FC;
  --mut: #5C6579;
  --mut-2: #8A93A6;
  --ok: #16A34A;
  --warn: #B45309;
  --err: #DC2626;
  --r: 10px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: #101527;
  background: #fff;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
[hidden] { display: none !important; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ---------- header ---------- */
header {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 14px;
  height: 52px; padding: 0 16px;
  background: #fff; border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; align-items: center; gap: 7px; font-weight: 800; font-size: 15px; letter-spacing: -.02em; white-space: nowrap; }
.brand svg { width: 18px; height: 18px; }
.brand i { font-style: normal; font-weight: 500; color: var(--mut-2); }
nav { display: flex; gap: 2px; }
nav button {
  border: 0; background: transparent; color: var(--mut); font-weight: 600;
  padding: 7px 12px; border-radius: 8px;
}
nav button:hover { background: var(--soft); color: var(--ink); }
nav button.on { background: var(--ink); color: #fff; }
.lang { margin-left: auto; display: flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.lang button { border: 0; background: #fff; padding: 6px 10px; font-size: 13px; font-weight: 700; color: var(--mut); }
.lang button.on { background: var(--ink); color: #fff; }

/* ---------- layout ---------- */
main { padding: 14px 16px 30px; max-width: 1500px; margin: 0 auto; }
.pane { display: none; }
.pane.on { display: block; }

.bar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 10px; }
.bar .sp { margin-left: auto; }
.sub { display: flex; gap: 2px; border-bottom: 1px solid var(--line); margin-bottom: 12px; }
.sub button { border: 0; background: transparent; color: var(--mut); font-weight: 600; padding: 8px 12px; border-bottom: 2px solid transparent; margin-bottom: -1px; }
.sub button.on { color: var(--pri); border-bottom-color: var(--pri); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 14px; border: 1px solid transparent; border-radius: 9px;
  font-weight: 650; font-size: 14px; line-height: 1; white-space: nowrap;
}
.btn.p { background: var(--pri); color: #fff; }
.btn.p:hover { background: var(--pri-2); }
.btn.d { background: var(--ink); color: #fff; }
.btn.o { border-color: var(--line); background: #fff; color: var(--ink); }
.btn.o:hover { background: var(--soft); }
.btn.g { background: var(--soft); color: var(--ink); }
.btn.mini { padding: 5px 9px; font-size: 13px; border-radius: 8px; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }

select, input[type=text] {
  padding: 7px 9px; border: 1px solid var(--line); border-radius: 8px;
  font: inherit; font-size: 14px; background: #fff; color: var(--ink); outline: 0;
}
select:focus, input[type=text]:focus { border-color: var(--pri); }
input[type=text] { font-family: var(--mono); font-size: 13.5px; }
label.chk { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; color: #2A3040; }
label.chk input { accent-color: var(--pri); width: 16px; height: 16px; }
label.f { display: inline-flex; align-items: center; gap: 7px; font-size: 13.5px; color: var(--mut); }

.grid { display: grid; gap: 10px; }
@media (min-width: 860px) { .grid.two { grid-template-columns: 1fr 1fr; } }
textarea {
  width: 100%; min-height: 46vh; padding: 11px 12px; resize: vertical;
  border: 1px solid var(--line); border-radius: var(--r); background: #fff; color: var(--ink);
  font-family: var(--mono); font-size: 13.5px; line-height: 1.55; outline: 0;
}
textarea:focus { border-color: var(--pri); }
textarea.short { min-height: 84px; }
textarea[readonly] { background: #FCFDFF; }

.stats {
  display: flex; flex-wrap: wrap; gap: 6px 16px; padding: 8px 2px 0;
  font-size: 12.5px; color: var(--mut); font-variant-numeric: tabular-nums;
}
.stats b { color: var(--ink); font-weight: 700; }
.dot { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 700; padding: 4px 9px; border-radius: 99px; background: var(--soft); color: var(--mut); }
.dot.ok { background: #E9F9EF; color: #0F7A38; }
.dot.err { background: #FEF2F2; color: var(--err); }
.dot.warn { background: #FFF7EA; color: var(--warn); }

.note { display: flex; gap: 8px; align-items: flex-start; padding: 9px 12px; border-radius: var(--r); font-size: 13.5px; margin-top: 10px; }
.note.ok { background: #E9F9EF; color: #14532D; }
.note.warn { background: #FFF7EA; color: #7C4A03; }
.note.err { background: #FEF2F2; color: #7F1D1D; }
.note b { font-weight: 700; }
.errline { font-family: var(--mono); font-size: 12.5px; border: 1px solid var(--err); border-radius: 8px; padding: 7px 9px; margin-top: 8px; overflow-x: auto; white-space: pre; }
.errline .hit { background: #FEE2E2; }

.big { font-family: var(--mono); font-size: 18px; font-weight: 700; word-break: break-all; background: #E9F9EF; border: 1px solid #BFE7CE; border-radius: var(--r); padding: 12px; margin-top: 8px; }
.hrow { display: flex; align-items: center; gap: 10px; padding: 7px 0; border-bottom: 1px solid var(--line-2); }
.hrow:last-child { border-bottom: 0; }
.hrow .al { flex: 0 0 84px; font-size: 11.5px; font-weight: 800; letter-spacing: .04em; text-transform: uppercase; color: var(--mut-2); }
.hrow .v { flex: 1; font-family: var(--mono); font-size: 12.5px; word-break: break-all; min-width: 0; }
.prog { height: 6px; border-radius: 99px; background: var(--line-2); overflow: hidden; margin: 10px 0 6px; }
.prog i { display: block; height: 100%; width: 0; background: var(--pri); transition: width .2s; }
.small { font-size: 12.5px; color: var(--mut); }
.mono { font-family: var(--mono); font-size: 13px; }
iframe.prev { width: 100%; min-height: 34vh; border: 1px solid var(--line); border-radius: var(--r); background: #fff; }
.toastwrap { position: fixed; left: 50%; bottom: 18px; transform: translateX(-50%); display: flex; flex-direction: column; gap: 6px; z-index: 50; }
.toast { background: var(--ink); color: #fff; font-size: 13.5px; font-weight: 600; padding: 9px 14px; border-radius: 9px; box-shadow: 0 8px 24px rgba(0,0,0,.18); }
@media (max-width: 640px) {
  textarea { min-height: 32vh; }
  header { gap: 8px; padding: 0 10px; }
  .brand i { display: none; }
  main { padding: 10px 10px 24px; }
}