:root{--bg:#f7f8fa;--card:#fff;--ink:#16202c;--muted:#5b6675;--line:#dfe3e8;--accent:#1f6feb;--accent-ink:#fff;--soft:#eef4ff;--warn:#fff7e6;--err:#b42318}
@media (prefers-color-scheme:dark){:root{--bg:#0f141a;--card:#171e26;--ink:#e6ebf1;--muted:#9aa6b4;--line:#2a3440;--accent:#4c8dff;--accent-ink:#06101f;--soft:#14233b;--warn:#2a2213;--err:#ff7b72}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:var(--accent)}
.top{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;max-width:860px;margin:0 auto;padding:14px 16px}
.brand{font-weight:700;text-decoration:none;color:var(--ink)}.brand span{color:var(--muted);font-weight:400}
.top nav a{margin-left:14px;font-size:14px;color:var(--muted);text-decoration:none}
main{max-width:860px;margin:0 auto;padding:0 16px 40px}
.hero h1{font-size:clamp(26px,5vw,38px);line-height:1.15;margin:18px 0 8px}
.lede{font-size:18px;color:var(--muted);margin:0 0 20px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;margin:16px 0}
.card h2{margin:0 0 12px;font-size:20px}.card h3{font-size:15px;margin:18px 0 6px}
.num{display:inline-grid;place-items:center;width:26px;height:26px;border-radius:50%;background:var(--accent);color:var(--accent-ink);font-size:14px;margin-right:6px}
.drop{display:flex;flex-direction:column;align-items:center;gap:4px;padding:32px 12px;border:2px dashed var(--line);border-radius:12px;cursor:pointer;text-align:center;background:var(--soft)}
.drop.over{border-color:var(--accent)}.drop input{position:absolute;width:1px;height:1px;opacity:0}
.drop span{color:var(--muted);font-size:14px}
.small{font-size:14px;color:var(--muted)}
.link{background:none;border:0;padding:0;color:var(--accent);text-decoration:underline;cursor:pointer;font:inherit}
.status{min-height:1.4em;font-size:14px}.status.err{color:var(--err)}
.mapping{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:8px}
.map-row{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:8px 10px;border:1px solid var(--line);border-radius:10px}
.map-col{display:flex;flex-direction:column;min-width:0}.map-col b{font-size:14px;overflow-wrap:anywhere}.map-col small{color:var(--muted);font-size:12px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
select,input[type=email]{font:inherit;font-size:14px;padding:7px 8px;border:1px solid var(--line);border-radius:8px;background:var(--card);color:var(--ink);max-width:100%}
.preview{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:12px;font-size:13px;overflow-x:auto;white-space:pre}
.count{font-weight:600}
.btn{font:inherit;font-weight:600;background:var(--accent);color:var(--accent-ink);border:0;border-radius:10px;padding:10px 18px;cursor:pointer}
.btn:disabled{opacity:.5;cursor:not-allowed}
.notice{background:var(--warn);border-radius:10px;padding:12px 14px;margin-top:14px}
.waitlist{display:flex;flex-wrap:wrap;gap:8px;align-items:center}.waitlist input{flex:1 1 220px}.waitlist .wl-msg{flex-basis:100%;margin:4px 0 0}
.content h2{margin-top:32px}.content h3{margin-bottom:4px}
.pro{border-color:var(--accent)}.tag{font-size:12px;background:var(--soft);color:var(--accent);padding:2px 8px;border-radius:99px;vertical-align:middle}
.ticks{padding-left:20px}
details{border-bottom:1px solid var(--line);padding:10px 0}summary{cursor:pointer;font-weight:600}
.foot{max-width:860px;margin:0 auto;padding:20px 16px 40px;color:var(--muted);font-size:13px;border-top:1px solid var(--line)}
.tools{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px}
.tools a{display:block;text-decoration:none;color:var(--ink)}