:root{--bg:#06100c;--panel:#0c1a14;--panel2:#11231b;--green:#81ff77;--acid:#c8ff61;--text:#f2f7f3;--muted:#91a99b;--line:#244032;--danger:#ff8e8e;--shadow:0 30px 80px rgba(0,0,0,.35)}
.planet{overflow:hidden}.planet img{display:block;width:100%;height:100%;object-fit:cover;border-radius:50%}
*{box-sizing:border-box}html{color-scheme:dark}body{margin:0;min-height:100vh;background:radial-gradient(circle at 15% 0,rgba(74,255,126,.10),transparent 30%),radial-gradient(circle at 90% 80%,rgba(202,255,97,.06),transparent 30%),var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}.shell{width:min(960px,calc(100% - 32px));margin:auto;padding:24px 0 30px}.brand{display:flex;justify-content:space-between;align-items:center;margin-bottom:54px;font-size:14px;letter-spacing:.14em}.brand-link{color:var(--text);text-decoration:none;display:flex;gap:10px;align-items:center}.brand-link b{color:var(--green)}.planet{display:grid;place-items:center;width:35px;height:35px;border:1px solid var(--line);border-radius:50%;background:var(--panel)}.local-pill{font-size:11px;color:var(--muted);letter-spacing:.05em;display:flex;align-items:center;gap:7px}.local-pill i{width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 12px var(--green)}.intro{text-align:center;max-width:720px;margin:0 auto 32px}.eyebrow{margin:0 0 12px;color:var(--green);font:700 11px/1.2 ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.17em}.intro h1{margin:0;font-size:clamp(36px,7vw,70px);line-height:.98;letter-spacing:-.055em}.intro h1 em{font-style:normal;color:var(--green)}.intro>p:last-child{color:var(--muted);font-size:16px;margin:18px auto 0}.tool-card{background:linear-gradient(145deg,rgba(18,39,29,.96),rgba(8,20,14,.96));border:1px solid var(--line);border-radius:22px;padding:18px;box-shadow:var(--shadow)}.dropzone{min-height:280px;border:1.5px dashed #3a624a;border-radius:16px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:30px;text-align:center;transition:.2s 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var(--line);border-radius:14px;background:rgba(0,0,0,.14)}.file-icon{display:grid;place-items:center;width:44px;height:44px;background:rgba(129,255,119,.1);color:var(--green);border-radius:10px}.file-meta{min-width:0;display:flex;flex-direction:column;gap:4px}.file-meta strong{white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.file-meta span{font-size:12px;color:var(--muted)}.icon-btn{margin-left:auto;border:0;background:transparent;color:var(--muted);font-size:28px;cursor:pointer}.progress-wrap{padding:34px 18px 18px}.progress-heading{display:flex;justify-content:space-between;font-size:13px;color:var(--muted);margin-bottom:10px}.progress-heading b{color:var(--green)}.progress{height:7px;background:#172a20;border-radius:10px;overflow:hidden}.progress span{height:100%;width:0;display:block;background:linear-gradient(90deg,var(--green),var(--acid));border-radius:10px;transition:width .3s}.results{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:14px}.result{position:relative;min-height:210px;border:1px solid var(--line);border-radius:16px;padding:24px;display:flex;flex-direction:column;justify-content:center;align-items:flex-start;overflow:hidden;background:rgba(0,0,0,.13)}.result:after{content:"";position:absolute;width:160px;height:160px;border-radius:50%;background:var(--green);opacity:.035;right:-55px;bottom:-70px}.result-label{text-transform:uppercase;color:var(--muted);font-size:10px;font-weight:800;letter-spacing:.14em}.result strong{font-size:clamp(46px,9vw,76px);line-height:1;letter-spacing:-.06em;margin:9px 0;color:var(--text)}.bpm-result strong{color:var(--green)}.unit{font-size:12px;color:var(--muted);margin-left:8px}.badge{font:700 11px/1 ui-monospace,SFMono-Regular,monospace;color:var(--green);background:rgba(129,255,119,.08);border:1px solid rgba(129,255,119,.18);border-radius:999px;padding:7px 9px}.result small{margin-top:14px;color:var(--muted)}.accuracy-note{grid-column:1/-1;margin:3px 4px 0;color:#71877a;font-size:11px;line-height:1.5}.error{margin-top:14px;padding:13px;border-radius:10px;color:var(--danger);background:rgba(255,80,80,.07);border:1px solid rgba(255,80,80,.2);font-size:13px}.tap-card{display:grid;grid-template-columns:1fr auto auto;align-items:center;gap:18px;margin-top:18px;padding:22px 26px;background:var(--panel);border:1px solid var(--line);border-radius:18px}.tap-card h2{margin:0 0 5px;font-size:22px}.tap-card p:last-child{margin:0;color:var(--muted);font-size:13px}.tap-button{width:88px;height:88px;border-radius:50%;border:1px solid #49735a;background:radial-gradient(circle,var(--panel2),var(--bg));color:var(--green);font-weight:900;cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;box-shadow:inset 0 0 25px rgba(129,255,119,.05)}.tap-button:active{transform:scale(.95);background:rgba(129,255,119,.12)}.tap-button span{font-size:19px}.tap-button small{font-size:9px;color:var(--muted);letter-spacing:.12em}.text-button{border:0;background:transparent;color:var(--muted);font-size:12px;cursor:pointer}footer{display:flex;justify-content:space-between;color:#587064;font-size:11px;padding:22px 4px 0}footer a{color:#789686;text-decoration:none}@media(max-width:620px){.shell{width:min(100% - 20px,960px);padding-top:14px}.brand{margin-bottom:38px}.local-pill{display:none}.intro h1{font-size:43px}.tool-card{padding:10px;border-radius:18px}.dropzone{min-height:245px}.results{grid-template-columns:1fr}.accuracy-note{grid-column:auto}.result{min-height:170px}.tap-card{grid-template-columns:1fr auto;padding:19px}.tap-card .text-button{grid-column:1/-1}.tap-card p:last-child{max-width:190px}footer{flex-direction:column;gap:8px;align-items:center}}