:root{color-scheme:light;--ink:#18201d;--muted:#66716b;--line:#d9e0db;--canvas:#f2f5f3;--surface:#fff;--green:#176d58;--green-dark:#105443;--blue:#326987;--red:#a74742;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}*{box-sizing:border-box}html,body{min-height:100%;margin:0}body{background:var(--canvas);color:var(--ink);font-size:15px;letter-spacing:0}[hidden]{display:none!important}button,select{font:inherit}.topbar{height:66px;display:flex;align-items:center;justify-content:space-between;padding:0 max(24px,calc((100% - 980px)/2));border-bottom:1px solid var(--line);background:rgba(255,255,255,.94)}.brand{display:flex;align-items:center;gap:10px;color:inherit;text-decoration:none}.brand-mark{width:34px;height:34px;display:grid;place-items:center;border-radius:6px;background:var(--ink);color:#fff;font-weight:800}.brand strong,.brand small{display:block}.brand strong{font-size:15px}.brand small{margin-top:1px;color:var(--muted);font-size:10px}.top-actions{display:flex;align-items:center;gap:9px}.account-name{max-width:180px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--muted);font-size:12px}.icon-button{width:36px;height:36px;display:grid;place-items:center;padding:0;border:1px solid var(--line);border-radius:5px;background:#fff;color:var(--ink);cursor:pointer}.icon-button svg,.primary-button svg,.secondary-button svg,.conversion-arrow svg,.upload-icon svg,.login-icon svg,.result-icon svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.shell{width:min(900px,calc(100% - 40px));margin:0 auto;padding:46px 0 64px}.center-view{min-height:55vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center}.center-view h1{margin:18px 0 8px;font-size:24px}.center-view p{margin:0 0 20px;color:var(--muted)}.spinner{width:30px;height:30px;border:3px solid #d8dfdb;border-top-color:var(--green);border-radius:50%;animation:spin .75s linear infinite}.login-icon{width:54px;height:54px;display:grid;place-items:center;border-radius:8px;background:#e5efe9;color:var(--green)}.login-icon svg{width:28px;height:28px}.text-link{margin-top:16px;color:var(--muted);font-size:13px}.page-heading{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:20px}.eyebrow{margin:0 0 5px;color:var(--green);font-size:11px;font-weight:800}.page-heading h1{margin:0;font-size:30px}.limit-label{padding:6px 9px;border:1px solid var(--line);border-radius:4px;background:#fff;color:var(--muted);font-size:11px;font-weight:700}.tool-surface{padding:26px;border:1px solid var(--line);border-radius:8px;background:var(--surface);box-shadow:0 12px 32px rgba(28,49,40,.05)}.drop-zone{width:100%;min-height:190px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:7px;border:1.5px dashed #aebbb3;border-radius:6px;background:#f9fbfa;color:var(--ink);cursor:pointer;transition:border-color .16s,background .16s}.drop-zone:hover,.drop-zone.dragging{border-color:var(--green);background:#f1f8f4}.upload-icon{width:44px;height:44px;display:grid;place-items:center;margin-bottom:5px;border-radius:7px;background:#e1eee7;color:var(--green)}.drop-zone strong{font-size:16px}.drop-zone span:last-child{color:var(--muted);font-size:12px}.file-row{min-height:74px;display:flex;align-items:center;gap:14px;padding:14px;border:1px solid var(--line);border-radius:6px;background:#f9fbfa}.file-badge{width:46px;height:46px;display:grid;place-items:center;flex:none;border-radius:5px;background:var(--blue);color:#fff;font-size:10px;font-weight:800}.file-meta{min-width:0;flex:1}.file-meta strong,.file-meta small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-meta small{margin-top:4px;color:var(--muted)}.conversion-row{display:grid;grid-template-columns:1fr 42px 1fr;align-items:end;gap:12px;margin-top:20px}.format-field span{display:block;margin-bottom:7px;color:var(--muted);font-size:11px;font-weight:700}.format-field output,.format-field select{width:100%;height:44px;display:flex;align-items:center;padding:0 12px;border:1px solid var(--line);border-radius:5px;background:#fff;color:var(--ink);font-size:13px;font-weight:700}.format-field select{appearance:auto}.conversion-arrow{height:44px;display:grid;place-items:center;color:#829089}.format-note{min-height:20px;margin:12px 0 0;color:var(--muted);font-size:12px}.error-message{min-height:20px;margin:5px 0;color:var(--red);font-size:12px}.primary-button,.secondary-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:42px;padding:0 17px;border-radius:5px;font-weight:750;text-decoration:none;cursor:pointer}.primary-button{border:0;background:var(--green);color:#fff}.primary-button:hover{background:var(--green-dark)}.primary-button:disabled{background:#a7b5ae;cursor:not-allowed}.secondary-button{border:1px solid var(--line);background:#fff;color:var(--ink)}.convert-button{width:100%}.progress-panel,.result-panel{margin-top:16px;padding:18px 20px;border:1px solid var(--line);border-radius:6px;background:#fff}.progress-heading{display:flex;justify-content:space-between}.progress-heading span{color:var(--green);font-variant-numeric:tabular-nums}.progress-track{height:7px;margin-top:12px;overflow:hidden;border-radius:4px;background:#e4e9e6}.progress-track span{display:block;width:0;height:100%;border-radius:inherit;background:var(--green);transition:width .25s}.progress-panel p{margin:9px 0 0;color:var(--muted);font-size:11px}.result-panel{display:flex;align-items:center;gap:14px}.result-icon{width:40px;height:40px;display:grid;place-items:center;flex:none;border-radius:50%;background:#e1eee7;color:var(--green)}.result-panel>div{min-width:0;flex:1}.result-panel p{margin:3px 0 0;overflow:hidden;color:var(--muted);font-size:12px;text-overflow:ellipsis;white-space:nowrap}.format-groups{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:16px}.format-groups>div{padding:16px 18px;border-left:3px solid #9eafa6;background:rgba(255,255,255,.58)}.format-groups strong,.format-groups span{display:block}.format-groups strong{font-size:12px}.format-groups span{margin-top:4px;color:var(--muted);font-size:11px;line-height:1.6}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:640px){.topbar{padding:0 16px}.account-name{display:none}.shell{width:min(100% - 28px,900px);padding:30px 0 48px}.page-heading h1{font-size:26px}.tool-surface{padding:16px}.drop-zone{min-height:160px}.conversion-row{grid-template-columns:1fr}.conversion-arrow{height:24px;transform:rotate(90deg)}.format-groups{grid-template-columns:1fr}.result-panel{align-items:flex-start;flex-wrap:wrap}.result-panel .secondary-button{width:100%}}
@media(prefers-reduced-motion:reduce){.spinner{animation:none}.progress-track span{transition:none}}