:root{--ink:#171714;--muted:#69665f;--paper:#fbfaf6;--paper-strong:#ffffff;--line:rgba(23,23,20,0.14);--coral:#e45745;--coral-dark:#c84232;--green:#8edd47;--shadow:0 18px 50px rgba(16,13,9,0.22),0 2px 10px rgba(16,13,9,0.12)}*{box-sizing:border-box}body,html{width:100%;min-height:100%;margin:0;overflow:hidden;background:#171714}body,button,input{font-family:Arial,Helvetica,sans-serif}button,input{-webkit-tap-highlight-color:transparent}button{font:inherit}.trace-app{position:relative;isolation:isolate;width:100%;min-height:100svh;overflow:hidden;color:white;background:radial-gradient(circle at 20% 25%,rgba(255,255,255,.08),transparent 28%),#24231f}.camera-feed,.camera-shade,.overlay-stage{position:absolute;inset:0}.camera-feed{inset:auto;z-index:0;top:50%;left:50%;width:100%;height:100%;object-fit:cover;pointer-events:none;background:#24231f;transform-origin:center;transition:transform .12s ease-out}.trace-app--camera-pannable{cursor:-webkit-grab;cursor:grab;touch-action:none}.trace-app--camera-panning{cursor:-webkit-grabbing;cursor:grabbing}.trace-app--camera-panning .camera-feed{transition:none}.trace-app--perspective-dragging,.trace-app--perspective-dragging *{cursor:none!important}.camera-feed--sideways{width:100svh;height:100vw}.camera-shade{z-index:1;pointer-events:none;background:linear-gradient(180deg,rgba(10,10,8,.46),transparent 19%,transparent 70%,rgba(10,10,8,.14))}.trace-app--error .camera-shade,.trace-app--idle .camera-shade,.trace-app--starting .camera-shade{background:rgba(18,18,15,.25)}.overlay-stage{z-index:2;pointer-events:none}.alignment-surface{position:absolute;top:calc(env(safe-area-inset-top) + 140px);right:20px;bottom:calc(env(safe-area-inset-bottom) + 228px);left:20px;pointer-events:none}.overlay-frame{position:absolute;top:50%;left:50%;display:grid;place-items:center;max-width:100%;max-height:100%;cursor:-webkit-grab;cursor:grab;touch-action:none;pointer-events:auto;border:1px solid rgba(255,255,255,.52);box-shadow:0 0 0 1px rgba(23,23,20,.18)}.overlay-frame:active{cursor:-webkit-grabbing;cursor:grabbing}.overlay-frame:focus-visible{outline:2px solid rgba(255,255,255,.78);outline-offset:3px}.trace-overlay{display:block;width:100%;height:100%;object-fit:contain;pointer-events:none;-webkit-user-select:none;-moz-user-select:none;user-select:none;-webkit-user-drag:none;transition:opacity .1s linear}.warped-overlay{position:absolute;top:0;left:0;transform-origin:0 0;pointer-events:none;border:1px solid rgba(255,255,255,.68);box-shadow:0 0 0 1px rgba(23,23,20,.18);will-change:transform}.warped-overlay--locked{border-color:transparent;box-shadow:none}.perspective-grid{position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(90deg,transparent calc(33.333% - .5px),rgba(255,255,255,.62) 33.333%,transparent calc(33.333% + .5px)),linear-gradient(90deg,transparent calc(66.666% - .5px),rgba(255,255,255,.62) 66.666%,transparent calc(66.666% + .5px)),linear-gradient(180deg,transparent calc(33.333% - .5px),rgba(255,255,255,.62) 33.333%,transparent calc(33.333% + .5px)),linear-gradient(180deg,transparent calc(66.666% - .5px),rgba(255,255,255,.62) 66.666%,transparent calc(66.666% + .5px));filter:drop-shadow(0 1px 1px rgba(23,23,20,.42))}.warped-overlay--locked .perspective-grid{display:none}.perspective-handle{position:absolute;z-index:2;width:36px;height:36px;padding:0;cursor:move;touch-action:none;pointer-events:auto;transform:translate(-50%,-50%);border:2px solid rgba(228,87,69,.88);border-radius:50%;background:transparent;box-shadow:0 0 0 2px rgba(255,255,255,.88),0 2px 9px rgba(23,23,20,.35);transition:opacity 70ms linear}.perspective-handle--dragging{opacity:0;cursor:none}.perspective-handle:focus-visible{outline:3px solid rgba(228,87,69,.45);outline-offset:3px}.alignment-toolbar{position:absolute;z-index:4;top:calc(env(safe-area-inset-top) + 76px);left:50%;display:flex;align-items:center;gap:7px;max-width:calc(100% - 24px);padding:5px;color:var(--ink);transform:translateX(-50%);border:1px solid rgba(255,255,255,.58);border-radius:14px;background:rgba(251,250,246,.96);box-shadow:0 8px 24px rgba(16,13,9,.2)}.alignment-actions,.alignment-mode{display:flex;align-items:center;gap:3px}.alignment-actions{padding-left:7px;border-left:1px solid var(--line)}.alignment-action,.alignment-button{min-height:34px;padding:0 10px;color:var(--muted);font-size:12px;font-weight:750;letter-spacing:-.01em;white-space:nowrap;cursor:pointer;border:0;border-radius:9px;background:transparent}.alignment-action:hover,.alignment-button:hover{color:var(--ink);background:rgba(23,23,20,.06)}.alignment-action--active,.alignment-button--active{color:white;background:var(--coral)}.alignment-action--active:hover,.alignment-button--active:hover{color:white;background:var(--coral-dark)}.alignment-action:focus-visible,.alignment-button:focus-visible{outline:3px solid rgba(228,87,69,.34);outline-offset:2px}.alignment-action{display:flex;align-items:center;gap:5px;padding-inline:8px}.alignment-action svg{width:15px;height:15px}.resize-handle{position:absolute;z-index:1;width:28px;height:28px;padding:0;cursor:nwse-resize;touch-action:none;pointer-events:auto;border:3px solid var(--paper-strong);border-radius:50%;background:var(--coral);box-shadow:0 2px 8px rgba(23,23,20,.34)}.resize-handle:focus-visible{outline:3px solid rgba(228,87,69,.42);outline-offset:3px}.resize-handle--top-left{top:-14px;left:-14px}.resize-handle--top-right{top:-14px;right:-14px;cursor:nesw-resize}.resize-handle--bottom-right{right:-14px;bottom:-14px}.resize-handle--bottom-left{bottom:-14px;left:-14px;cursor:nesw-resize}.app-header{position:absolute;z-index:4;top:0;left:0;width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:calc(env(safe-area-inset-top) + 20px) 24px 18px;text-shadow:0 1px 9px rgba(0,0,0,.52)}.brand{font-size:32px;font-weight:700;letter-spacing:-.055em}.camera-status{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:700;letter-spacing:-.01em}.status-dot{width:9px;height:9px;border-radius:50%;background:#aaa69f;box-shadow:0 0 0 3px rgba(255,255,255,.15)}.camera-status--live .status-dot{background:var(--green)}.camera-status--starting .status-dot,.camera-status--switching .status-dot{background:#f0b84b;animation:pulse 1s ease-in-out infinite}.camera-status--error .status-dot{background:var(--coral)}.camera-resolution{font-size:12px;font-weight:600;opacity:.78}.welcome{position:absolute;z-index:3;top:50%;left:50%;width:min(100% - 40px,480px);padding:32px;color:var(--ink);text-align:center;transform:translate(-50%,-48%);background:var(--paper);border:1px solid rgba(255,255,255,.4);border-radius:22px;box-shadow:var(--shadow)}.welcome-icon{display:grid;place-items:center;width:54px;height:54px;margin:0 auto 22px;color:var(--coral);border:1px solid rgba(228,87,69,.22);border-radius:16px;background:rgba(228,87,69,.08)}.welcome-icon svg{width:27px;height:27px}.welcome h1{max-width:390px;margin:0 auto 12px;font-size:clamp(30px,7vw,42px);line-height:.99;letter-spacing:-.052em}.welcome>p{max-width:390px;margin:0 auto 26px;color:var(--muted);font-size:16px;line-height:1.5;letter-spacing:-.015em}.choose-button,.primary-button{display:flex;align-items:center;justify-content:center;width:100%;min-height:58px;gap:11px;color:white;font-size:17px;font-weight:700;letter-spacing:-.015em;cursor:pointer;border:1px solid rgba(96,18,9,.14);border-radius:14px;background:var(--coral);box-shadow:0 6px 16px rgba(178,52,37,.22);transition:transform .14s ease,background .14s ease,box-shadow .14s ease}.choose-button:hover,.primary-button:hover{background:var(--coral-dark);box-shadow:0 8px 20px rgba(178,52,37,.28)}.choose-button:active,.primary-button:active{transform:translateY(1px)}.choose-button:focus-visible,.control-slider:focus-visible,.primary-button:focus-visible{outline:3px solid rgba(228,87,69,.34);outline-offset:3px}.primary-button:disabled{cursor:wait;opacity:.72}.camera-error{display:flex;align-items:flex-start;gap:10px;margin:0 0 20px;padding:13px 14px;color:#812c22;text-align:left;font-size:14px;line-height:1.4;border:1px solid rgba(228,87,69,.22);border-radius:12px;background:rgba(228,87,69,.08)}.camera-error svg{flex:0 0 auto;width:20px;height:20px;margin-top:1px}.control-dock{position:absolute;z-index:4;right:16px;bottom:calc(env(safe-area-inset-bottom) + 14px);left:16px;display:grid;grid-gap:14px;gap:14px;width:min(560px,calc(100% - 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