:root{font-family:'Manrope',system-ui,-apple-system,Segoe UI,sans-serif;background:#080d18;color:#eaf4ff;font-synthesis:none;-webkit-font-smoothing:antialiased;--bg:#080d18;--panel:#101b2a;--border:#263449;--aqua:#76d2ff;--muted:#7f93ac;--green:#5ce9ba}
*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;background:radial-gradient(ellipse 80% 440px at 48% -160px,#192e4c 0,transparent 100%),var(--bg)}button{font:inherit;cursor:pointer}button:focus-visible{outline:2px solid var(--aqua);outline-offset:3px}svg{width:20px;height:20px;flex:none} .topbar{height:73px;padding:0 clamp(18px,4vw,36px);max-width:1240px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #1c2b3a}.brand{display:flex;align-items:center;gap:12px}.brand-icon{width:41px;height:41px;border:1px solid #3c779c;border-radius:12px;background:#112a43;color:var(--aqua);display:grid;place-items:center;box-shadow:0 0 25px #2ab1ff16}.brand-icon svg{width:25px;height:25px}.brand-text{display:flex;flex-direction:column;gap:3px}.brand-text strong{font-size:14px;letter-spacing:.11em;font-weight:800}.brand-text strong span{color:var(--aqua)}.brand-text small{font-size:9px;font-weight:800;letter-spacing:.19em;color:#7088a2}.brand-text .version{color:#b0d3e6}.local-badge{font-size:11px;font-weight:700;color:#9bffe0;background:#0d2b2b;border:1px solid #1d5346;border-radius:100px;padding:8px 12px;display:flex;align-items:center;gap:7px}.status-dot,.footer-pulse,.hud-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:#59dfb5;box-shadow:0 0 12px #59dfb566}
.shell{max-width:1180px;margin:0 auto;padding:30px clamp(16px,4vw,36px) 40px}.intro{display:flex;align-items:flex-end;justify-content:space-between;gap:22px;margin:0 0 22px}.eyebrow{font-size:10px;font-weight:800;letter-spacing:.19em;color:#8dbbdb;display:flex;align-items:center;gap:9px}.eyebrow-line{display:inline-block;width:20px;height:1px;background:#75cfff}.intro h1{font-size:clamp(26px,4.4vw,40px);line-height:1.15;letter-spacing:-.055em;margin:12px 0 10px;font-weight:800}.intro h1 em{font-style:normal;color:var(--aqua)}.intro p{margin:0;color:#8c9eb3;font-size:13px;line-height:1.6}.hero-open{background:linear-gradient(120deg,#4cafe5,#78d3fa);border:0;color:#071625;font-weight:800;font-size:12px;padding:13px 18px;border-radius:12px;white-space:nowrap;display:flex;align-items:center;gap:9px;box-shadow:0 8px 30px #2aa8ef28}.hero-open svg{width:18px;height:18px}
.viewport-card,.properties-card{border:1px solid var(--border);border-radius:17px;background:var(--panel);overflow:hidden;box-shadow:0 18px 50px #00000022}.viewport-top{height:67px;display:flex;justify-content:space-between;align-items:center;padding:0 19px;background:#111e2e;border-bottom:1px solid var(--border)}.model-title{display:flex;align-items:center;min-width:0;gap:11px}.model-symbol{width:37px;height:37px;border-radius:11px;display:grid;place-items:center;background:#173149;color:#7dcdf7}.model-title>span:last-child{min-width:0;display:flex;flex-direction:column;gap:4px}.model-title strong{font-size:12px;letter-spacing:.015em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:440px}.model-title small{font-size:10px;color:#7694af}.icon-btn{height:33px;width:33px;display:grid;place-items:center;background:#17283b;color:#b4cee4;border:1px solid #304257;border-radius:9px}.icon-btn svg{width:17px;height:17px}.viewport-body{height:clamp(310px,48vw,490px);position:relative;background:radial-gradient(ellipse at 50% 45%,#203c54 0,#101e2d 39%,#0c1523 80%);overflow:hidden;touch-action:none}.viewport-body canvas{width:100%;height:100%;display:block;outline:0}.viewport-body.dragover{outline:2px dashed var(--aqua);outline-offset:-8px}.viewer-hud{position:absolute;top:17px;left:19px;font-size:9px;font-weight:800;color:#a2b5ca;letter-spacing:.11em;pointer-events:none}.hud-dot{width:6px;height:6px;margin-right:7px;background:#75d2ff}.hud-separator{color:#456075;margin:0 5px}.orientation-gizmo{position:absolute;top:14px;right:21px;color:#c2d9ed;font-size:10px;font-weight:800;display:flex;gap:6px;pointer-events:none}.orientation-gizmo span{width:23px;height:23px;display:grid;place-items:center;border:1px solid #506179;border-radius:5px;background:#142235a8}.gizmo-z{color:#7acaf4!important}.gizmo-y{color:#9ee1b0!important}.gizmo-x{color:#f5a8a8!important}.viewer-loading{position:absolute;inset:0;display:none;align-items:center;justify-content:center;background:#101e2ce8;color:#cbd9e7;text-align:center;padding:20px;font-size:13px;z-index:4}.viewer-loading.visible{display:flex}.viewport-instructions{position:absolute;left:20px;bottom:21px;color:#64809a;font-size:10px;pointer-events:none}.view-controls{position:absolute;right:17px;bottom:15px;display:flex;gap:5px;background:#101d2bcc;border:1px solid #30445a;padding:5px;border-radius:10px}.view-btn{border:0;background:transparent;color:#8aa3bb;font-size:10px;font-weight:700;padding:7px 9px;border-radius:6px;min-height:29px}.view-btn.active{background:#254965;color:#b9eaff}.view-btn svg{height:15px;width:15px;vertical-align:middle}.viewport-bottom{display:flex;justify-content:space-between;align-items:center;min-height:48px;padding:0 20px;background:#121f30;border-top:1px solid #25384c}.viewport-bottom>span{color:#95afc5;font-size:10px;font-weight:700}.footer-pulse{width:6px;height:6px;margin-right:8px}.small-action{display:flex;align-items:center;gap:6px;border:1px solid #31435a;color:#9bb2c8;background:#192a3e;border-radius:7px;font-size:10px;padding:7px 10px}.small-action svg{height:15px;width:15px}.small-action.active{color:#83d2ff;border-color:#47789f;background:#1a3a53}
.properties-card{margin-top:20px;padding:22px 24px 17px}.section-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.eyebrow.muted{font-size:9px;color:#6f94b5}.section-heading h2{margin:6px 0 0;font-size:17px;letter-spacing:-.02em}.measure-tag{font-size:10px;font-weight:800;color:#8acbf2;border:1px solid #2e5270;background:#142d42;padding:7px 9px;border-radius:7px;letter-spacing:.12em}.properties-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.property{min-width:0;border:1px solid #283b50;background:linear-gradient(145deg,#16283c,#142337);border-radius:12px;padding:15px 17px;position:relative}.prop-label{display:block;white-space:nowrap;color:#829bb4;font-size:10px;font-weight:800;letter-spacing:.08em;margin-bottom:12px}.prop-label small{color:#70c9fe;font-size:11px;margin-left:4px}.property strong{font-size:clamp(16px,2.8vw,23px);font-weight:800;letter-spacing:-.045em;display:inline;overflow-wrap:anywhere}.unit{font-size:10px;margin-left:6px;color:#7591ad}.integrity{border-radius:10px;margin-top:15px;padding:11px 13px;display:flex;align-items:center;gap:9px;font-size:11px;font-weight:650;border:1px solid #274d46;background:#102c2c;color:#8eebc5}.integrity.warning{color:#f4cb8b;border-color:#6b4c26;background:#312718}.integrity-icon{width:18px;height:18px;border-radius:50%;background:#23745b;color:#baffd8;display:grid;place-items:center;font-size:11px;flex:none}.integrity.warning .integrity-icon{background:#855f31}.footnote{font-size:10px;line-height:1.6;color:#728aa3;margin:13px 0 0}.bottom-section{display:flex;gap:11px;margin-top:18px}.primary-button,.secondary-button{height:48px;border-radius:12px;font-size:12px;font-weight:800}.primary-button{border:0;background:linear-gradient(120deg,#4ba9e1,#7ad8fb);color:#071b29;flex:1;display:flex;justify-content:center;align-items:center;gap:10px}.primary-button svg{height:18px;width:18px}.secondary-button{background:#162639;border:1px solid #30465b;color:#a7c2d8;padding:0 22px}.privacy-note{font-size:11px;color:#5e819d;text-align:center;margin:22px 0 0;display:flex;align-items:center;justify-content:center;gap:7px}.privacy-note svg{height:14px;width:14px}.toast{position:fixed;bottom:calc(24px + env(safe-area-inset-bottom));left:50%;transform:translate(-50%,16px);padding:12px 17px;border:1px solid #426e80;border-radius:11px;background:#184052;color:#d2f4ff;z-index:30;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;box-shadow:0 10px 45px #0008;text-align:center;font-size:12px;max-width:min(90vw,450px)}.toast.visible{opacity:1;transform:translate(-50%,0)}.toast.error{background:#452628;color:#ffe4d9;border-color:#885259}
@media (max-width:650px){.topbar{height:66px;padding:0 16px}.shell{padding:24px 14px 30px}.intro{display:block;margin-bottom:19px}.intro h1{font-size:clamp(26px,7.5vw,34px);margin:11px 0 9px}.intro p{font-size:12px}.hero-open{display:none}.viewport-top{height:60px;padding:0 13px}.model-title strong{max-width:calc(100vw - 155px)}.viewport-body{height: min(52vh,390px);min-height:280px}.viewer-hud{left:14px;top:14px;font-size:8px}.orientation-gizmo{right:12px;top:12px}.viewport-instructions{display:none}.view-controls{left:50%;right:auto;bottom:12px;transform:translateX(-50%);white-space:nowrap}.viewport-bottom{padding:0 14px}.properties-card{padding:18px 13px 14px;margin-top:15px}.properties-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:7px}.property{padding:12px 10px;min-height:84px}.prop-label{font-size:8px;letter-spacing:.03em;margin-bottom:10px}.prop-label small{font-size:9px}.property strong{font-size:16px}.unit{font-size:9px;margin-left:4px}.integrity{font-size:10px}.section-heading h2{font-size:16px}.footnote{font-size:9px}.bottom-section{margin-top:14px}.privacy-note{font-size:9px}.version{display:none}}
@media (max-width:370px){.brand-text strong{font-size:12px}.brand-text small{font-size:8px}.local-badge{font-size:10px;padding:7px 9px}.prop-label{font-size:7px}.unit{display:block;margin:4px 0 0}.view-btn{font-size:9px;padding:7px 7px}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

/* v0.1.1: Real native file inputs under the fingertip instead of JS .click() on a hidden input.
   Do not set accept: iOS Files/Telegram may grey out .stl when UTType is unknown. */
.file-trigger{position:relative;overflow:hidden;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent}
.file-trigger:focus-within{outline:2px solid #76d2ff;outline-offset:2px}
.file-trigger .stl-input{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer;font-size:16px;z-index:5}
.file-feedback{font-size:11px;line-height:1.5;color:#8fb5cb;text-align:center;max-width:720px;margin:13px auto 4px;min-height:18px;padding:0 12px}
.file-feedback.error{color:#ffaaa7}
.file-feedback.ok{color:#8be9bf}