/* Shared stylesheet — direction A technical micro-tool cluster (English outward-facing) */
:root{
  --bg:#0b1220; --bg-2:#0f172a; --panel:#16213a; --panel-2:#1e293b;
  --text:#e2e8f0; --muted:#94a3b8; --faint:#64748b;
  --accent:#38bdf8; --accent-2:#22d3ee; --border:#2b3a57;
  --ok:#34d399; --warn:#fbbf24; --bad:#f87171; --radius:14px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  background:linear-gradient(180deg,#0b1220 0%,#0f172a 320px);
  color:var(--text);line-height:1.65;min-height:100vh;
}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1180px;margin:0 auto;padding:24px 20px 72px}
header.site{
  border-bottom:1px solid var(--border);padding:18px 0;margin-bottom:24px;
  display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;
}
header.site .brand{font-size:20px;font-weight:700;letter-spacing:.2px;color:var(--text);text-decoration:none}
header.site .brand span{color:var(--accent)}
header.site a.brand:hover{color:var(--text);text-decoration:none;opacity:.85}
header.site nav a{margin-left:16px;color:var(--muted);font-size:14px}
header.site nav a:hover{color:var(--text)}
h1{font-size:30px;line-height:1.25;margin:.2em 0 .3em}
h2{font-size:20px;margin:1.6em 0 .6em;border-left:3px solid var(--accent);padding-left:10px}
/* Prose measure: at the full 1180px container a line runs ~139 characters,
   well past the comfortable 45–75 range. Cap running text, not the tool UI. */
.lede{color:var(--muted);font-size:16px;margin:.4em 0 1.4em;max-width:72ch}
.faq p,.card > p{max-width:72ch}
.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:18px;margin:16px 0}
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;margin:18px 0}
.tool-grid a{
  display:block;background:var(--panel);border:1px solid var(--border);
  border-radius:var(--radius);padding:16px;color:var(--text);transition:.15s;
}
.tool-grid a:hover{transform:translateY(-2px);border-color:var(--accent);text-decoration:none}
.tool-grid a .t{font-weight:600;font-size:15px}
.tool-grid a .d{color:var(--muted);font-size:13px;margin-top:6px}
label{display:block;font-size:13px;color:var(--muted);margin:14px 0 6px}
textarea,input[type=text],select{
  width:100%;background:var(--bg-2);color:var(--text);border:1px solid var(--border);
  border-radius:10px;padding:11px 12px;font-size:14px;font-family:"SFMono-Regular",ui-monospace,Menlo,Consolas,monospace;
}
textarea{min-height:150px;resize:vertical}
button{
  margin-top:14px;background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:#04121f;border:0;border-radius:10px;padding:11px 18px;font-size:14px;font-weight:600;cursor:pointer;
}
button.ghost{background:transparent;color:var(--text);border:1px solid var(--border)}
button:hover{opacity:.92}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.row > *{margin-top:0}
pre.out{background:#0a0f1c;border:1px solid var(--border);border-radius:10px;padding:12px;overflow:auto;font-size:13px;white-space:pre-wrap;word-break:break-all}
table.kv{width:100%;border-collapse:collapse;margin-top:10px;font-size:14px}
table.kv td{padding:8px 10px;border-bottom:1px solid var(--border)}
table.kv td.k{color:var(--muted);width:42%}
table.kv td.v{font-family:ui-monospace,Menlo,Consolas,monospace;word-break:break-all}
.copy{color:var(--accent);cursor:pointer;font-size:12px}
.crumbs{font-size:13px;color:var(--faint);margin-bottom:10px}
.crumbs a{color:var(--muted)}
.related{margin-top:30px}
.related h3{font-size:16px;margin:0 0 12px}
.ad-slot{
  margin:22px 0;padding:14px;text-align:center;color:var(--faint);font-size:12px;
  border:1px dashed var(--border);border-radius:10px;background:rgba(148,163,184,.04);
}
footer.site{border-top:1px solid var(--border);margin-top:48px;padding:20px 0;color:var(--faint);font-size:13px}
.note{background:rgba(56,189,248,.08);border:1px solid rgba(56,189,248,.25);border-radius:10px;padding:12px 14px;font-size:14px;color:var(--text);margin:14px 0}
@media(min-width:1600px){.wrap{max-width:1320px}}
@media(max-width:900px){h1{font-size:26px}}
@media(max-width:560px){h1{font-size:24px}.wrap{padding:16px 12px 56px}.tool-grid{grid-template-columns:1fr}}