:root{--ink:#15171a;--muted:rgba(0,0,0,.55);--faint:#8a887d;--line:rgba(0,0,0,.1);--accent:#FF1A75;--bg:#fff;--up:#1a7f4b;--down:#c0392b;--soft:#f7f7f8}
*{box-sizing:border-box}
body{font:16px/1.6 Inter,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;color:var(--ink);background:var(--bg);margin:0;-webkit-font-smoothing:antialiased}
a{color:var(--ink)}a:hover{color:var(--accent)}
.topbar{border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);z-index:5}
.topbar-in{max-width:760px;margin:0 auto;padding:13px 20px;display:flex;align-items:center;gap:10px}
.logo{width:26px;height:26px;border-radius:6px;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
.brand{font-weight:700;letter-spacing:-.02em;text-decoration:none;color:inherit}
.wrap{max-width:760px;margin:0 auto;padding:28px 20px 80px}
h1{font-weight:700;font-size:clamp(26px,4vw,34px);line-height:1.15;letter-spacing:-.025em;margin:.1em 0 .15em}
.sub{color:var(--faint);font-size:14px;margin:0 0 22px}
.card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px 22px;margin:16px 0}
label{display:block;font-weight:600;font-size:14px;margin:14px 0 5px}
.hint{font-weight:400;color:var(--faint);font-size:12px}
input,select{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:8px;font:inherit;background:#fff}
input:focus,select:focus{outline:2px solid var(--accent);border-color:transparent}
.row{display:flex;gap:14px;flex-wrap:wrap}.row>div{flex:1;min-width:150px}
.seg{display:flex;gap:0;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.seg button{flex:1;padding:10px;border:0;background:#fff;font:inherit;font-weight:600;cursor:pointer;color:var(--muted)}
.seg button.on{background:var(--accent);color:#fff}
.out{background:var(--soft);border-radius:12px;padding:20px 22px;margin:18px 0}
.big{font-weight:700;font-size:34px;letter-spacing:-.02em}
.lbl{color:var(--faint);font-family:ui-monospace,SFMono-Regular,monospace;font-size:11px;text-transform:uppercase;letter-spacing:.05em}
.grid2{display:flex;gap:14px;flex-wrap:wrap;margin-top:10px}.grid2>div{flex:1;min-width:140px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:13px 15px}
.v{font-weight:700;font-size:21px}
.note{font-size:12.5px;color:var(--faint);line-height:1.55;margin-top:14px}
.tlist{max-height:260px;overflow:auto;border:1px solid var(--line);border-radius:10px;margin-top:12px}
.tlist a{display:flex;justify-content:space-between;padding:9px 14px;border-bottom:1px solid rgba(0,0,0,.05);text-decoration:none;font-size:14px}
.tlist a:hover{background:var(--soft)}
.tools-grid{display:flex;gap:14px;flex-wrap:wrap;margin-top:18px}
.tool{flex:1;min-width:220px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px;text-decoration:none;color:inherit}
.tool:hover{border-color:var(--accent)}.tool h3{margin:.2em 0 .3em;font-size:18px}.tool p{margin:0;color:var(--muted);font-size:14px}
.back{font-size:13px;color:var(--faint);text-decoration:none}.back:hover{color:var(--accent)}
.src{color:var(--faint);font-size:11.5px;line-height:1.55;margin-top:22px;border-top:1px solid var(--line);padding-top:14px}
body.embed .topbar,body.embed .back,body.embed h1,body.embed .sub{display:none}
body.embed .wrap{padding:16px 14px 24px}