:root{--ink:#14213d;--muted:#65738d;--line:#dfe6ef;--paper:#f7f9fc;--blue:#123a70;--blue2:#2466c2;--sky:#e9f3ff;--mint:#e5f7f0;--green:#27896a;--amber:#f3a832;--danger:#c44545;--radius:20px}[hidden]{display:none!important}*{box-sizing:border-box}body{min-width:320px;color:var(--ink);background:var(--paper);margin:0;font-family:ui-rounded,PingFang SC,Microsoft YaHei,system-ui,sans-serif}button,input,textarea{font:inherit}button{cursor:pointer}.app-shell{width:min(100%,560px);min-height:100dvh;padding:env(safe-area-inset-top) 20px calc(28px + env(safe-area-inset-bottom));background:#fff;margin:auto;box-shadow:0 0 40px #0f376812}.topbar{justify-content:space-between;align-items:center;height:62px;display:flex}.brand{color:var(--blue);letter-spacing:.02em;align-items:center;gap:9px;font-weight:800;text-decoration:none;display:flex}.brand-mark{color:#fff;background:var(--blue);border-radius:11px;place-items:center;width:30px;height:30px;font-size:23px;line-height:1;display:grid}.icon-button,.back-button,.text-button{color:var(--blue);background:0 0;border:0}.icon-button{border-radius:50%;width:38px;height:38px;font-size:24px}.icon-button:hover{background:var(--sky)}.view{animation:.24s fade;display:none}.view.active{display:block}@keyframes fade{0%{opacity:.3;transform:translateY(4px)}to{opacity:1;transform:none}}h1{letter-spacing:-.045em;margin:7px 0 14px;font-size:clamp(28px,7.6vw,40px);line-height:1.2}h2{letter-spacing:-.02em;margin:0;font-size:18px}p{line-height:1.6}.eyebrow{color:var(--blue2);letter-spacing:.12em;margin:0;font-size:12px;font-weight:800}.hero{padding:47px 4px 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(width>=700px){body{padding:20px 0}.app-shell{border-radius:28px;min-height:calc(100dvh - 40px)}}@media (width<=380px){.app-shell{padding-left:16px;padding-right:16px}.trust-row strong{font-size:10px}.duration-row{gap:5px}.duration{font-size:11px}}.roi-canvas{touch-action:none;cursor:crosshair;width:100%;height:100%;position:absolute;inset:0}.roi-help{color:#fff;text-align:center;pointer-events:none;background:#04142aa3;border-radius:9px;padding:8px 10px;font-size:11px;font-weight:800;position:absolute;top:12px;left:12px;right:12px}#setupVideo{transform:none}.camera-picker{border:1px solid var(--line);background:#f8fbff;border-radius:13px;margin:12px 0 2px;padding:11px 12px}.camera-picker label{color:var(--blue);font-size:13px}.camera-picker select{width:100%;height:38px;color:var(--ink);background:#fff;border:1px solid #ccd8e7;border-radius:9px;margin-top:6px;padding:0 9px}.camera-picker small{color:var(--muted);margin-top:7px;font-size:11px;line-height:1.45;display:block}.session-actions{grid-template-columns:1fr}