:root{--bg:#f5f5f7;--card:rgba(255,255,255,.82);--ink:#1d1d1f;--muted:#6e6e73;--blue:#0071e3;--red:#ff3b30;--green:#34c759;--line:rgba(0,0,0,.09)}*{box-sizing:border-box}html{background:var(--bg)}body{margin:0;color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,SF Pro Display,Segoe UI,sans-serif;-webkit-font-smoothing:antialiased;background:radial-gradient(circle at 50% 0,#fff 0,transparent 34rem)}header{height:52px;display:flex;align-items:center;justify-content:space-between;padding:0 max(22px,calc((100vw - 1120px)/2));background:#ffffffb8;-webkit-backdrop-filter:saturate(180%) blur(20px);backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:2}header b{font-size:14px}header span{font-size:10px;letter-spacing:.08em;color:var(--muted)}main{width:min(980px,calc(100% - 40px));margin:auto}.hero{text-align:center;padding:88px 0 48px}.hero>p:first-child{font-size:12px;font-weight:600;color:var(--blue);letter-spacing:.08em}.hero h1{font-size:clamp(46px,7vw,76px);line-height:1.02;letter-spacing:-.055em;margin:13px 0 22px}.hero h1~p{font-size:20px;line-height:1.45;color:var(--muted);max-width:650px;margin:auto}.upload{background:var(--card);border:1px solid rgba(255,255,255,.8);box-shadow:0 18px 60px #00000014;border-radius:24px;padding:24px;display:grid;grid-template-columns:1fr 1fr;gap:14px;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px)}.upload label{display:grid;gap:7px;padding:20px;background:#f5f5f7;border-radius:16px}.upload label b{font-size:15px}.upload label span{font-size:12px;color:var(--muted);line-height:1.4}.upload input{margin-top:9px;font-size:12px}.upload button{grid-column:1/-1;border:0;border-radius:980px;background:var(--blue);color:#fff;font-weight:600;font-size:14px;padding:13px;cursor:pointer;transition:.2s}.upload button:hover{background:#0077ed;transform:scale(1.003)}#status{grid-column:1/-1;text-align:center;color:var(--muted);font-size:12px}.result{background:var(--card);border:1px solid rgba(255,255,255,.8);box-shadow:0 10px 35px #0000000e;padding:20px 22px;margin-top:14px;border-radius:18px;display:flex;justify-content:space-between;align-items:center}.result h3,.result p{margin:0}.result h3{font-size:16px;margin-bottom:7px}.result p{color:var(--muted);font-size:12px}.result:before{content:"";width:9px;height:9px;background:var(--green);border-radius:50%;margin-right:14px;box-shadow:0 0 0 5px #34c7591f}.result>div{flex:1}.result.fail:before{background:var(--red);box-shadow:0 0 0 5px #ff3b301f}.result button{border:0;background:#e8f2ff;color:var(--blue);font-weight:600;padding:10px 14px;border-radius:980px;cursor:pointer}footer{text-align:center;color:#86868b;font-size:11px;padding:55px}@media(max-width:700px){header span{display:none}.hero{padding:58px 0 35px}.hero h1{font-size:43px}.hero h1~p{font-size:17px}.upload{grid-template-columns:1fr;border-radius:20px}.result{align-items:flex-start}.result button{white-space:nowrap}}.file-panel{display:flex;flex-direction:column;align-items:flex-start;gap:8px;padding:20px;background:#f5f5f7;border-radius:16px;min-width:0;transition:.2s}.file-panel>b{font-size:15px}.file-panel>span{font-size:12px;line-height:1.4;color:var(--muted)}.file-panel.dragging{background:#eaf4ff;box-shadow:inset 0 0 0 2px var(--blue)}#workbooks,#timing{position:absolute!important;width:1px!important;height:1px!important;opacity:0!important;overflow:hidden!important;pointer-events:none!important}.upload .choose-button{grid-column:auto;width:auto;align-self:flex-start;margin-top:9px;padding:11px 18px;background:#fff;color:var(--blue);border:1px solid rgba(0,113,227,.2);box-shadow:0 1px 3px #0000000d}.upload .choose-button:hover{background:#fff;transform:none;border-color:var(--blue)}#selectedWorkbooks,#selectedTiming{display:block;max-width:100%;color:var(--muted);font-size:11px;line-height:1.4;overflow-wrap:anywhere}.file-panel em{font-style:normal;font-weight:400;color:var(--muted)}@media(max-width:700px){.file-panel{padding:20px}}