:root{font-family:-apple-system,BlinkMacSystemFont,'Helvetica Neue',Arial,sans-serif;font-synthesis:none;color:#202431;background:#edf0f7;--ink:#202431;--muted:#697181;--blue:#2869dc;--stroke:#ffffffd9;--glass:linear-gradient(145deg,#ffffffe8,#ffffff78);--ease:cubic-bezier(.22,.8,.22,1)}*{box-sizing:border-box}body{margin:0;min-height:100svh}button,a,input{ -webkit-tap-highlight-color:transparent}button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}button:disabled{opacity:.3;cursor:default}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #4989f5;outline-offset:4px}button,a{touch-action:manipulation}button{font-size:14px}button:hover{filter:brightness(.97)}.ambient{position:fixed;inset:0;pointer-events:none;background:radial-gradient(ellipse at 92% 48%,#ccdafa 0,transparent 47%),radial-gradient(ellipse at 40% 0,#fff 0,transparent 50%),radial-gradient(ellipse at 80% 100%,#e5def4 0,transparent 40%);z-index:-1}.glass{background:var(--glass);backdrop-filter:blur(24px) saturate(1.4);-webkit-backdrop-filter:blur(24px) saturate(1.4);border:1px solid var(--stroke);box-shadow:0 8px 28px #2b3f6910,inset 0 1px 1px #fff}.topbar{position:relative;z-index:5;margin:22px 36px 0;padding:14px 21px;border-radius:26px;display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:66px}.brand{font-weight:760;font-size:26px;letter-spacing:-1.5px;display:flex;gap:16px;align-items:center}.brand span{font-size:14px;letter-spacing:-.2px;font-weight:500;color:#586174}.header-actions{display:flex;align-items:center;gap:23px;font-size:14px}.version{color:#848b99;font-size:12px;letter-spacing:.3px}.print-link span{margin-left:6px}.category-nav{position:sticky;top:12px;z-index:6;display:flex;width:max-content;max-width:calc(100% - 48px);margin:24px auto 0;padding:5px;border-radius:40px;background:#ffffffc4;backdrop-filter:blur(25px) saturate(1.5);-webkit-backdrop-filter:blur(25px) saturate(1.5);box-shadow:0 5px 25px #2032520b,inset 0 0 0 1px #fff;gap:3px;overflow:auto;scrollbar-width:none}.category-nav button{white-space:nowrap;padding:12px 20px;border-radius:30px;font-size:14px;font-weight:530;transition:background .3s,color .3s,box-shadow .3s}.category-nav button.active{background:#252d3b;color:white;box-shadow:0 3px 9px #25324e20}.category-nav button:hover:not(.active){background:#e6ebf4}.category-nav .n{opacity:.5;margin-right:7px;font-size:12px}.content{width:60%;padding:50px 20px 36px 48px;max-width:1120px}.category-heading{margin:0 0 37px;max-width:660px}.eyebrow{text-transform:uppercase;letter-spacing:1.9px;font-size:12px;font-weight:650;color:#7a8498;margin:0 0 15px}h1{font-size:clamp(37px,3.8vw,61px);line-height:1.04;letter-spacing:-2.6px;margin:0 0 17px;font-weight:650}.subtitle{font-size:17px;line-height:1.6;color:var(--muted);max-width:530px;margin:0}.tile-section{margin-bottom:35px}.section-title{font-size:14px;letter-spacing:.1px;font-weight:600;color:#637087;margin:0 0 15px;padding-left:4px}.tile-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.tile{position:relative;background:linear-gradient(140deg,#ffffff,#ffffffed);border:1px solid #ffffff;border-radius:24px;padding:24px;box-shadow:0 9px 22px #27365906,0 1px 2px #27365904;transition:transform .3s var(--ease),box-shadow .3s;min-width:0;display:flex;flex-direction:column;overflow:hidden}.tile:hover{transform:translateY(-3px);box-shadow:0 17px 35px #33496b12}.tile-heading{display:flex;justify-content:space-between;gap:12px;align-items:flex-start;margin-bottom:14px}.tile h3{margin:0;font-size:21px;line-height:1.15;font-weight:620;letter-spacing:-.65px}.watch-tile{background:#eff4fc;color:#3476de;flex:none;border-radius:50%;height:34px;width:34px;display:grid;place-items:center;transition:background .2s,transform .2s}.watch-tile:hover{background:#dceaff;transform:scale(1.08)}.watch-tile svg{width:13px;height:13px;margin-left:2px;fill:currentColor}.gesture{font-size:13px;font-weight:620;line-height:1.6;color:#3471cd;margin-bottom:12px;letter-spacing:0}.tile-body{font-size:16px;line-height:1.55;color:#525e70;margin:0;flex:1}.tile details{margin-top:18px;border-top:1px solid #edf0f5;padding-top:12px;color:#778193;font-size:13px;line-height:1.6}.tile summary{cursor:pointer;list-style:none;width:max-content;font-size:12px;display:flex;align-items:center;gap:8px}.tile summary::after{content:'+';font-size:15px}.tile details[open]>summary::after{content:'−'}.tile details p{margin-bottom:0}.tile:target{outline:2px solid var(--blue);outline-offset:3px}#deviceStage{position:fixed;right:0;top:170px;bottom:22px;width:40%;z-index:2;pointer-events:none;transition:width .7s var(--ease),height .7s var(--ease),top .7s var(--ease),left .7s var(--ease),right .7s var(--ease),bottom .7s var(--ease)}#viewport{position:absolute;inset:0;pointer-events:auto}#viewport canvas{display:block;width:100%;height:100%;touch-action:none;cursor:grab}#fallback{width:100%;height:100%;object-fit:contain;mix-blend-mode:multiply;pointer-events:none}#loadStatus{position:absolute;bottom:30%;left:0;right:0;text-align:center;color:#778499;font-size:14px;pointer-events:none}#loadStatus:empty{display:none}footer{font-size:12px;color:#919aab;display:flex;justify-content:space-between;gap:20px;padding:26px 4px 10px}footer button{font-size:12px;color:#657087}#focusScrim{position:fixed;inset:0;z-index:10;background:#e8edf4dd;backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px)}body.focused #deviceStage{z-index:12;right:36%;top:6vh;bottom:115px;width:64%}#demo{position:fixed;inset:0;z-index:13;pointer-events:none}#demo button,#demo a{pointer-events:auto}.close{position:absolute;right:30px;top:25px;pointer-events:auto}.round{display:inline-grid;place-items:center;min-width:44px;height:44px;font-size:21px;border-radius:50%;line-height:1}.demo-copy{position:absolute;left:65%;right:5%;top:50%;transform:translateY(-55%);pointer-events:auto}.demo-copy h2{font-size:clamp(29px,3.3vw,47px);font-weight:640;line-height:1.08;letter-spacing:-1.8px;margin:0 0 38px}.step-caption{min-height:145px}.step-caption>span{font-size:12px;font-weight:600;color:#497de0}.step-caption h3{font-size:24px;font-weight:590;letter-spacing:-.6px;line-height:1.2;margin:10px 0 14px}.step-caption p{font-size:17px;line-height:1.55;color:#67748b;margin:0}.demo-note{font-size:13px;line-height:1.6;color:#7c8799;border-top:1px solid #cdd6e5;padding-top:20px;margin-top:25px}.demo-dock{position:absolute;bottom:25px;left:50%;transform:translateX(-50%);border-radius:50px;padding:10px 15px;display:flex;align-items:center;gap:18px;width:min(650px,calc(100% - 40px));pointer-events:auto}.transport{display:flex;gap:1px}.play-main{background:#25344e;color:#fff;font-size:18px}.timeline{flex:1;min-width:0}#stepSegments{display:flex;gap:5px}#stepSegments button{height:5px;border-radius:5px;background:#cdd5e2;flex:1;padding:0;position:relative;min-width:6px}#stepSegments button::before{content:'';position:absolute;inset:-12px 0}#stepSegments button.done{background:#a1b9df}#stepSegments button.current{background:#3475df}.demo-copy[data-changing]{animation:caption-in .35s var(--ease)}@keyframes caption-in{from{opacity:.35;transform:translateY(calc(-55% + 8px))}to{opacity:1;transform:translateY(-55%)}}dialog{background:#f9fbff;border:1px solid white;border-radius:28px;padding:32px;color:var(--ink);box-shadow:0 30px 120px #12234033;max-width:560px;width:calc(100% - 36px);max-height:86svh}dialog::backdrop{background:#25324c50;backdrop-filter:blur(8px)}.dialog-head{display:flex;align-items:start;justify-content:space-between;gap:20px}.dialog-head h2{font-size:28px;letter-spacing:-1px;font-weight:620;margin:0 0 18px}.dialog-head .eyebrow{margin-bottom:9px}dialog>p{font-size:16px;line-height:1.65;color:#637087}dialog a{color:var(--blue);font-size:15px}dialog .small{font-size:12px}.modifiers{display:flex;gap:10px;margin:20px 0}.modifiers button,#accessibleButtons button,#resetDevice{padding:11px 15px;background:#e9eff9;border-radius:12px}.modifiers button[aria-pressed=true]{background:#2d6edc;color:#fff}#accessibleButtons{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px}#accessibleFaders label{display:flex;justify-content:space-between;font-size:14px;margin:15px 0 7px}#accessibleFaders input{width:100%;accent-color:var(--blue)}#resetDevice{width:100%;margin-top:10px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}[hidden]{display:none!important}
@media(min-width:1800px){.content{width:62%;padding-left:max(48px,calc((100vw - 1750px)/2))}#deviceStage{right:3%;width:36%}}@media(max-width:1100px){.topbar{margin:18px 22px 0}.content{width:62%;padding:38px 10px 30px 26px}#deviceStage{width:38%}.category-nav button{padding:11px 14px}.tile{padding:19px}.tile h3{font-size:19px}.tile-body{font-size:15px}.tile-grid{gap:12px}.demo-copy{left:61%;right:4%}.demo-copy h2{font-size:34px}.step-caption h3{font-size:22px}.step-caption p{font-size:16px}body.focused #deviceStage{right:39%;width:61%}}@media(max-width:780px){.topbar{margin:12px 12px 0;padding:13px 16px;border-radius:23px}.brand{font-size:25px;gap:10px}.brand span{font-size:12px}.header-actions{gap:13px}.version,.print-link{display:none}.category-nav{margin:16px 12px 0;max-width:calc(100% - 24px);width:auto;top:8px;justify-content:flex-start}.category-nav button{padding:11px 13px;font-size:13px}.category-nav .n{display:none}.content{width:100%;padding:310px 20px 25px}.category-heading{margin-bottom:28px}h1{font-size:40px;letter-spacing:-1.8px}.subtitle{font-size:16px}.tile-grid{gap:13px}.tile{padding:20px}.tile-body{font-size:16px}.tile h3{font-size:21px}.tile-heading{gap:8px}.tile-section{margin-bottom:30px}#deviceStage{position:absolute;top:141px;right:0;width:100%;height:300px;bottom:auto}.eyebrow{font-size:12px}.content footer{padding:18px 0}body.focused #deviceStage{position:fixed;left:0;right:0;top:38px;bottom:auto;width:100%;height:43svh}.demo-copy{left:25px;right:25px;top:46svh;transform:none;max-height:calc(54svh - 115px);overflow:auto;padding-bottom:15px}.demo-copy h2{font-size:28px;letter-spacing:-1px;margin-bottom:22px}.demo-copy .eyebrow{font-size:11px;margin-bottom:9px}.step-caption{min-height:90px}.step-caption h3{font-size:21px;margin:7px 0 9px}.step-caption p{font-size:16px}.demo-note{font-size:12px;margin:17px 0 0;padding-top:14px}.close{top:12px;right:13px;z-index:5}.demo-dock{bottom:14px;padding:8px 10px;gap:9px;width:calc(100% - 24px)}.round{min-width:40px;height:40px}.transport{gap:0}.demo-copy[data-changing]{animation:none}#focusScrim{background:#edf1f8f2}}@media(max-width:520px){.tile-grid{grid-template-columns:1fr}.content{padding-left:18px;padding-right:18px}.tile{padding:23px}.tile-heading{margin-bottom:11px}.tile h3{font-size:22px}.gesture{font-size:14px}.tile-body{font-size:16px}.tile details{font-size:14px}.watch-tile{width:38px;height:38px}.header-actions button{font-size:14px}.demo-note{display:none}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}@media(prefers-reduced-transparency:reduce){.glass,.category-nav,#focusScrim{background:#f4f7fc;backdrop-filter:none;-webkit-backdrop-filter:none}}@media(prefers-contrast:more){:root{--muted:#3d4d66}.tile{border-color:#8e9bb0}.tile-body,.subtitle,.step-caption p{color:#3d4d66}.eyebrow{color:#4c5b71}.gesture{color:#1558b9}}@media print{#deviceStage,.topbar,.category-nav,.watch-tile,footer{display:none}.content{width:100%;padding:0}.tile{break-inside:avoid;box-shadow:none;border:1px solid #bbb}.ambient{display:none}.tile details{display:block}}

.touch-cue{position:absolute;width:29px;height:29px;border:1.5px solid #4589ed;border-radius:50%;transform:translate(-50%,-50%);box-shadow:0 0 0 5px #438be519;background:#5aa3ff14;pointer-events:none}.tile:only-child{grid-column:1 / -1}.tile:only-child .tile-body{max-width:640px}
/* The guide is one continuous page. Playback stays beside the tiles. */
.guide-category{scroll-margin-top:90px;margin-bottom:82px}.guide-category+.guide-category{padding-top:38px;border-top:1px solid #d6dfed}.tile.is-playing{box-shadow:0 0 0 2px #6ea1f1,0 14px 32px #416ba919}.tile.is-playing .watch-tile{background:#3579e5;color:white}
#demo{position:fixed;left:61%;right:18px;top:auto;bottom:20px;z-index:4;pointer-events:none;max-width:650px;background:#f5f8fded;border:1px solid #ffffff;border-radius:24px;box-shadow:0 10px 36px #273f6f0c;backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px)}
#demo .demo-copy{position:relative;left:auto;right:auto;top:auto;transform:none;max-height:250px;overflow:auto;padding:23px 24px 4px;margin:0}#demo .demo-copy h2{font-size:18px;line-height:1.25;letter-spacing:-.4px;margin:0 28px 15px 0}#demo .demo-copy .eyebrow{display:none}#demo .step-caption{min-height:88px}#demo .step-caption h3{font-size:20px;line-height:1.2;letter-spacing:-.5px;margin:7px 0 9px}#demo .step-caption p{font-size:15px;line-height:1.5}#demo .demo-note{display:none}#demo .close{right:7px;top:6px;height:34px;min-width:34px;font-size:16px;background:none;box-shadow:none;border:0;backdrop-filter:none}#demo .demo-dock{position:relative;bottom:auto;left:auto;transform:none;width:auto;max-width:none;margin:9px;border:0;box-shadow:none;background:#e8eef878;border-radius:30px;padding:7px;gap:7px;backdrop-filter:none}#demo .round{height:35px;min-width:35px;font-size:19px}#demo .demo-copy[data-changing]{animation:none}.demonstrating #deviceStage{bottom:260px;top:150px}body #focusScrim{display:none!important}
@media(max-width:1100px) and (min-width:781px){#demo{left:63%;right:10px}#demo .demo-copy{padding:19px 16px 2px}#demo .demo-dock{gap:4px}#demo .round{min-width:30px;height:33px}.demonstrating #deviceStage{bottom:280px;top:145px}}
@media(max-width:780px){.guide-category{scroll-margin-top:85px;margin-bottom:58px}.guide-category+.guide-category{padding-top:30px}#demo{position:fixed;left:12px;right:12px;bottom:12px;border-radius:22px;z-index:8;max-width:none}#demo .demo-copy{padding:17px 20px 0;max-height:150px}#demo .demo-copy h2{font-size:16px;margin-bottom:10px}#demo .step-caption{min-height:0}#demo .step-caption h3{font-size:18px;margin:5px 0}#demo .step-caption p{font-size:14px}#demo .step-caption>span{font-size:11px}#demo .demo-dock{margin:7px}.demonstrating #deviceStage{position:fixed;right:0;left:auto;top:80px;bottom:auto;width:48%;height:240px;z-index:7;filter:drop-shadow(0 8px 16px #30466524);pointer-events:none}.demonstrating #viewport{pointer-events:auto}.demonstrating .content{padding-bottom:250px}}
@media(max-width:780px){#demo{min-height:245px}#demo .demo-copy{width:57%;min-height:184px;max-height:184px;padding:19px 10px 5px 18px}#demo .demo-copy h2{margin-right:0;font-size:14px}#demo .step-caption h3{font-size:17px}#demo .step-caption p{font-size:13px}#demo .demo-dock{margin:8px}.demonstrating #deviceStage{top:auto;bottom:74px;right:19px;width:40%;height:177px;z-index:9;filter:none}.demonstrating .content{padding-bottom:280px}}

/* Simple gesture cues: solid while held, eight spaced dashes for taps. */
.touch-cue[data-kind="tap"]{border-color:transparent}
.touch-cue[data-kind="tap"]::after{content:"";position:absolute;inset:-1.5px;border-radius:50%;background:center/100% 100% no-repeat url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'%3E%3Ccircle cx='16' cy='16' r='14' fill='none' stroke='%234589ed' stroke-width='1.65' stroke-dasharray='6 4.996' transform='rotate(-90 16 16)'/%3E%3C/svg%3E")}
/* A gentle breath keeps the gesture cue visible without changing its meaning. */
.touch-cue{animation:cue-breathe 2.4s ease-in-out infinite}
@keyframes cue-breathe{0%,100%{transform:translate(-50%,-50%) scale(.88);opacity:1}50%{transform:translate(-50%,-50%) scale(1.16);opacity:1}}
@media(prefers-reduced-motion:reduce){.touch-cue{animation:none;opacity:1}}
/* Keep the close control above the caption and the mobile model canvas. */
#demo{z-index:10}
#demo #closeDemo{z-index:2;pointer-events:auto;width:44px;min-width:44px;height:44px;top:0;right:0}

/* Reveal the prepared camera pose; the reference still is only a WebGL-error fallback. */
#viewport canvas{opacity:0;transition:opacity .25s ease}
body[data-model="ready"] #viewport canvas{opacity:1}
@media(prefers-reduced-motion:reduce){#viewport canvas{transition:none}}

/* Keep the physical model beside the caption as practice controls wrap below it. */
.demonstrating #deviceStage{bottom:calc(var(--demo-height,240px) + 38px)}
@media(max-width:780px){.demonstrating #deviceStage{z-index:11;height:160px;bottom:calc(var(--demo-height,245px) - 193px)}}
.gesture-composer{position:fixed;inset:0;pointer-events:none;z-index:30}.latch-arrow,.latch-choices{position:absolute}.latch-arrow{font-size:27px;color:#2869dc;display:flex;align-items:center;gap:8px;animation:latch-out .35s ease-out}.latch-arrow span{font-size:13px;font-weight:650}.latch-choices{display:flex;gap:8px;pointer-events:auto;background:#f8fbfff5;padding:7px;border:1px solid white;border-radius:30px;box-shadow:0 8px 30px #263d6222}.latch-choices button{border-radius:22px;padding:14px 20px;background:#e6edfa;min-width:70px}.latch-choices button.selected{background:#2869dc;color:white;transform:scale(1.07)}.combo-tray{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);max-width:calc(100% - 24px);border-radius:22px;padding:12px;display:flex;gap:8px;align-items:center;flex-wrap:wrap;pointer-events:auto}.combo-chips{display:flex;flex-wrap:wrap;gap:6px}.combo-chips button{border:1px dashed #6290d1;border-radius:18px;padding:9px 12px;background:#f7faff}.combo-chips button.latched{border-style:solid;background:#e1ecff}.combo-help{font-size:11px;color:#657187;flex-basis:100%;order:5}.combo-submit,.combo-cancel{border-radius:50%;width:40px;height:40px;font-size:22px;background:#e7edf7}.combo-submit{background:#2869dc;color:white}.gesture-feedback{position:absolute;top:90px;left:50%;transform:translateX(-50%);border-radius:20px;background:#25344eed;color:white;padding:10px 18px;font-size:13px;max-width:90%;text-align:center}@keyframes latch-out{from{opacity:0;transform:translateX(-12px)}to{opacity:1;transform:translateX(0)}}@media(prefers-reduced-motion:reduce){.latch-arrow{animation:none}}
.audio-preview{border:1px solid rgba(30,40,50,.12);border-radius:20px;background:rgba(255,255,255,.6);padding:8px 12px;font:inherit;font-size:12px;cursor:pointer;white-space:nowrap}.audio-preview[aria-pressed=true]{background:#20272b;color:white}

.latch-arrow{width:max-content}

.audio-source{display:flex;align-items:center;gap:6px}.audio-source-picker{display:flex;flex-direction:column;gap:2px;font-size:9px;color:#60676b}.audio-source-picker select{max-width:150px;border:0;background:transparent;color:#20272b;font:inherit;font-size:12px;cursor:pointer}.audio-source .audio-preview{font-size:18px;width:36px;height:36px;padding:0}.audio-source .audio-preview[aria-pressed=true]{background:rgba(255,255,255,.6);color:#777}
@media(max-width:780px){.audio-source-picker select{max-width:94px}.audio-source{gap:3px}.topbar{gap:10px}.audio-source .audio-preview{width:32px;height:36px}}
/* Compact input and gesture controls share the guide's glass treatment. */
.audio-source{display:inline-flex;align-items:center;gap:5px;padding:3px 7px 3px 3px;border:1px solid #ffffffc9;border-radius:24px;background:#ffffff70;box-shadow:inset 0 1px 1px #fff}
.audio-source select{font-family:inherit;font-size:12px;color:#596477;max-width:155px;background:transparent;border:0;outline-offset:4px;padding:7px 2px;cursor:pointer;text-overflow:ellipsis}
.audio-source .audio-preview{display:grid;place-items:center;width:34px;height:34px;border:0;background:transparent;color:#4b5d74;box-shadow:none}
.audio-source .audio-preview[aria-pressed=true]{background:transparent;color:#8090a5}
.latch-arrow{display:inline-flex;flex-direction:row;align-items:center;gap:7px;white-space:nowrap;width:max-content;line-height:1;font-size:25px;letter-spacing:0;color:#3476de;filter:drop-shadow(0 1px 2px #ffffff);pointer-events:none}
.latch-arrow span{font-size:12px;font-weight:600;line-height:1}
.latch-choices{gap:4px;padding:5px;border-radius:24px;background:#f8fbffe8;backdrop-filter:blur(24px) saturate(1.3);-webkit-backdrop-filter:blur(24px) saturate(1.3);border:1px solid #fff;box-shadow:0 10px 32px #263d621c,inset 0 1px 1px #fff}
.latch-choices button{display:flex;align-items:center;justify-content:center;gap:8px;min-width:94px;min-height:48px;padding:12px 16px;border-radius:19px;font-size:13px;font-weight:550;background:transparent;color:#61718a;transition:background .14s,color .14s}
.latch-choices button:before{content:'';width:13px;height:13px;border:1.5px dashed currentColor;border-radius:50%}.latch-choices button[data-kind=hold]:before{border-style:solid}
.latch-choices button.selected{background:#e2edff;color:#2869dc;transform:none;box-shadow:inset 0 0 0 1px #d4e3fb}
.combo-tray{padding:8px;gap:7px;border-radius:24px;background:#f8fbffe8;backdrop-filter:blur(24px) saturate(1.35);-webkit-backdrop-filter:blur(24px) saturate(1.35);box-shadow:0 12px 36px #263d621c;max-width:min(650px,calc(100% - 24px))}
.combo-chips{gap:5px;max-width:100%}.combo-chips button{display:flex;align-items:center;gap:7px;border:1px solid #e0e7f3;border-radius:17px;padding:10px 12px;min-height:40px;background:#ffffffb3;color:#5b6a82;font-size:12px}
.combo-chips strong{font-weight:650;color:#304966}.combo-chips span{font-size:11px;color:#7a879b}.combo-chips i{font-style:normal;color:#99a5b7;margin-left:4px}.combo-chips button.latched{background:#e8f0ff;border-color:#d6e4fc}
.combo-help{font-size:11px;line-height:1.5;padding:1px 7px 3px;color:#7d8ba1}.combo-submit,.combo-cancel{width:38px;height:38px;font-size:20px;flex-shrink:0}.combo-cancel{background:transparent;color:#8491a5}.combo-submit{background:#3476de;box-shadow:0 3px 9px #3476de20}
@media(max-width:780px){.audio-source select{max-width:94px;font-size:11px}.audio-source{padding-right:4px;gap:1px}.audio-source .audio-preview{width:30px}.combo-tray{bottom:16px}.latch-choices button{min-width:88px}}
/* Keep the complete combination readable, with independent touch targets. */
.combo-tray{width:max-content;display:grid;grid-template-columns:minmax(0,1fr) 44px 44px;align-items:center;bottom:max(16px,env(safe-area-inset-bottom))}
.combo-chips{grid-column:1;grid-row:1;min-width:0}.combo-submit{grid-column:2;grid-row:1}.combo-cancel{grid-column:3;grid-row:1}.combo-help{grid-column:1/-1;grid-row:2;margin:0}
.combo-submit,.combo-cancel,.combo-chips button{min-height:44px}.combo-submit,.combo-cancel{width:44px;height:44px}
.demonstrating .combo-tray{bottom:calc(var(--demo-height,245px) + 32px)}
@media(max-width:780px){.combo-tray{width:calc(100% - 24px)}.combo-chips{max-height:132px;overflow:auto}.combo-chips button{padding:9px 10px}.audio-source .audio-preview{width:38px;height:38px}.audio-source select{max-width:102px;min-height:38px}}
@media(max-width:380px){.topbar{padding:12px;gap:8px}.brand{font-size:23px;gap:8px;white-space:nowrap;flex-shrink:0}.brand span{font-size:11px}.audio-source select{max-width:83px;font-size:10px}.audio-source .audio-preview{width:34px}}

/* App-wide touch suppression; keyboard focus-visible outlines remain intact. */
html,body,body *,body *::before,body *::after{-webkit-tap-highlight-color:transparent;-webkit-touch-callout:none;-webkit-user-select:none;user-select:none}
.topbar button:hover,.topbar button:active{filter:none}
.audio-source .audio-preview:is(:hover,:active,:focus-visible){background:transparent;box-shadow:none}
@media(hover:none),(pointer:coarse){.category-nav button:hover:not(.active){background:transparent;filter:none}.category-nav button.active:hover{filter:none}}

/* Touch-generated hover must not flash or lift cards. Keep meaningful active states. */
@media(hover:none),(pointer:coarse){button:hover{filter:none}.tile:hover{transform:none;box-shadow:0 9px 22px #27365906,0 1px 2px #27365904}.tile.is-playing:hover{box-shadow:0 0 0 2px #6ea1f1,0 14px 32px #416ba919}.watch-tile:hover{background:#eff4fc;transform:none}.tile.is-playing .watch-tile:hover{background:#3579e5}}

/* Fixed-size vector arrow and text share a single optical center. */
.latch-arrow{height:24px;gap:7px;line-height:24px}
.latch-arrow svg{display:block;width:28px;height:16px;flex:none;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.latch-arrow[data-direction=left] svg{transform:rotate(180deg)}
.latch-arrow span{display:block;line-height:24px}
/* Smaller visible confirmation circle, with the original 44px touch target. */
.combo-submit{position:relative;isolation:isolate;background:transparent;box-shadow:none;display:grid;place-items:center;font-size:17px;padding:0}
.combo-submit::before{content:'';position:absolute;width:30px;height:30px;left:7px;top:7px;border-radius:50%;background:#3476de;box-shadow:0 3px 9px #3476de20;z-index:-1}
.audio-home{display:inline-flex;flex:none}
.audio-source[data-placement=floating]{position:fixed;right:24px;top:78px;z-index:15;background:#f5f8fdeb;backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px);box-shadow:0 6px 24px #273f6f14}
.demo-audio-slot{display:none}
@media(max-width:780px){
 .audio-source[data-placement=floating]{top:auto;bottom:max(14px,env(safe-area-inset-bottom));right:max(14px,env(safe-area-inset-right))}
 body:has(.combo-tray:not([hidden])) .audio-source[data-placement=floating]{top:68px;bottom:auto}
 .content footer{padding-bottom:72px}
 .audio-docked .demo-audio-slot{display:flex;justify-content:flex-end;align-items:center;height:48px;padding:0 13px 8px;pointer-events:auto}
 .audio-source[data-placement=walkthrough]{background:transparent;border-color:transparent;box-shadow:none;padding-top:0;padding-bottom:0}
 .audio-docked.demonstrating #deviceStage{bottom:122px}
}

/* A single compact action row, with dismiss separated from committing a combo. */
.combo-tray{grid-template-columns:minmax(0,1fr) auto;width:max-content;max-width:min(650px,calc(100% - 24px));padding:20px 36px 10px 10px;gap:8px;border-radius:22px}
.combo-chips{grid-column:1;grid-row:1;gap:6px}
.combo-chips button{min-height:40px;padding:9px 11px;border-radius:14px}
.combo-submit{grid-column:2;grid-row:1;display:inline-flex;align-items:center;justify-content:center;gap:5px;width:auto;min-width:74px;height:40px;min-height:40px;padding:0 12px;border-radius:14px;background:#3476de;color:#fff;font-size:12px;font-weight:600}
.combo-submit::before{display:none}
.combo-submit svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.combo-cancel{position:absolute;grid-column:auto;grid-row:auto;right:0;top:0;width:32px;height:32px;min-height:32px;display:grid;place-items:center;padding:0;font-size:19px;color:#8693a6;background:transparent}
.latch-arrow[data-direction=left]{flex-direction:row-reverse}
@media(max-width:780px){.combo-tray{width:max-content;max-width:calc(100% - 24px)}.combo-chips{max-height:132px}.combo-submit{min-height:44px}.combo-cancel{width:36px;height:36px;min-height:36px}.combo-tray{padding-top:24px;padding-right:40px}}
/* Orientation and progressive reference: one scrolling guide, one device. */
.guide-intro{scroll-margin-top:95px;margin:0 0 72px}.guide-intro h1{font-size:clamp(36px,3.6vw,58px);line-height:1.06;letter-spacing:-2px;margin:12px 0 22px}.intro-lead{max-width:560px;font-size:18px;line-height:1.6;color:#59677e;margin:0 0 36px}.orientation,.starting-path{margin:0 0 30px;padding:25px;border:1px solid #ffffffd9;border-radius:24px;background:#ffffff94}.guide-intro h2{font-size:22px;letter-spacing:-.6px;margin:0 0 10px}.orientation>p,.starting-path>p{font-size:14px;line-height:1.6;color:#637087;margin:0 0 18px}.context-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin:23px 0 18px}.context-grid h3{font-size:16px;margin:0 0 8px}.context-grid p{font-size:14px;line-height:1.5;color:#637087;margin:0}.orientation .context-note{font-size:13px;margin-bottom:0}.gesture-primer{border-top:1px solid #dfe6f0;margin-top:20px;padding-top:18px}.gesture-primer summary{cursor:pointer;font-size:14px;font-weight:600;line-height:1.5}.gesture-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:20px}.gesture-grid strong,.gesture-grid span{display:block;font-size:13px;line-height:1.5}.gesture-grid span{color:#637087;margin-top:5px}.gesture-primer>p{font-size:13px;line-height:1.6;color:#637087;margin:18px 0 0}.start-lesson{width:100%;display:flex;align-items:center;text-align:left;gap:15px;padding:17px 0;border-top:1px solid #dfe6f0}.start-number{color:#2869dc;font-size:13px;font-weight:700;background:#e8effc;min-width:30px;height:30px;border-radius:50%;display:grid;place-items:center}.start-lesson strong{display:block;font-size:16px}.start-lesson small{display:block;color:#637087;font-size:13px;line-height:1.5;margin-top:4px}.start-play{margin-left:auto;flex-shrink:0;width:32px;height:32px;border-radius:50%;background:#e8effc;color:#2869dc;display:grid;place-items:center}.start-play svg{width:13px;height:13px;fill:currentColor}.starting-path .input-hint{font-size:12px;margin:14px 0 0}.reference-link{display:inline-flex;gap:16px;font-size:14px;color:#2869dc;padding:4px 0}.category-title{font-size:clamp(32px,3.3vw,48px);line-height:1.08;letter-spacing:-1.5px;margin:10px 0 16px}.group-intro{font-size:15px;line-height:1.65;color:#637087;max-width:650px;margin:0 0 22px}.related-guides{border-top:1px solid #e1e7f1;margin-top:18px;padding-top:15px}.related-guides>summary{display:flex;gap:10px;align-items:center;cursor:pointer;font-size:13px;color:#47638d;list-style:none}.related-guides>summary::before{content:'+';font-size:17px}.related-guides[open]>summary::before{content:'−'}.related-count{margin-left:auto;color:#7b8ba1;font-size:12px}.related-card{border-top:1px solid #e1e7f1;margin-top:20px;padding-top:20px}.related-card h3{font-size:17px!important;line-height:1.3}.related-card .tile-body{font-size:14px;line-height:1.6}.related-card .gesture{font-size:12px}.related-card .watch-tile{flex-shrink:0}.related-card.is-playing{border-top-color:#2869dc}.related-card .card-note{font-size:13px}summary:focus-visible{outline:3px solid #4989f5;outline-offset:4px;border-radius:3px}
@media(max-width:780px){.guide-intro h1{font-size:40px}.intro-lead{font-size:16px}.orientation,.starting-path{padding:21px}.context-grid{grid-template-columns:1fr;gap:17px}.context-grid>div{display:grid;grid-template-columns:64px 1fr;gap:13px}.context-grid h3{margin:0}.guide-intro{margin-bottom:54px}.gesture-grid{gap:16px}.category-title{font-size:36px}.start-lesson{gap:12px}.start-lesson strong{font-size:15px}}

.tile .related-guides>summary{width:100%}.tile details.related-guides>summary::after{content:none}.related-card{color:var(--ink)}

/* Mouse/trackpad readers can select copy; touch-first devices retain suppression. */
@media(hover:hover) and (pointer:fine){
 html,body,body *,body *::before,body *::after{-webkit-user-select:text;user-select:text}
 button,button *,input,select,canvas,#deviceStage,#deviceStage *,summary,summary *, .gesture-composer,.gesture-composer *{-webkit-user-select:none;user-select:none}
}

.context-grid .context-entry{font-size:13px;color:#445774;margin-top:13px}.context-show{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:8px 0;color:var(--blue);font-size:13px;font-weight:600}.context-show span{display:flex}.context-show svg{width:11px;height:11px;fill:currentColor}
@media(max-width:780px){.context-grid>div{display:block}.context-grid>div+div{border-top:1px solid #dfe6f0;padding-top:17px}.context-grid h3{margin-bottom:7px}.context-grid .context-entry{margin-top:8px}}

/* The second starting step groups three ways to explore the same recording. */
.start-shape{padding:20px 0;border-top:1px solid #dfe6f0}
.start-shape-heading{display:flex;gap:15px;align-items:flex-start}
.start-shape-heading .start-number{flex-shrink:0}
.start-shape-heading h3{font-size:16px;line-height:1.5;margin:2px 0 0}
.start-shape-heading p{font-size:13px;line-height:1.5;color:#637087;margin:4px 0 0}
.shape-options{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:16px 0 0 45px}
.shape-options button{display:flex;align-items:center;justify-content:space-between;gap:8px;text-align:left;padding:12px;border:1px solid #dfe6f0;border-radius:14px;background:#ffffff80;min-height:64px}
.shape-options strong{display:block;font-size:14px;line-height:1.4}
.shape-options small{display:block;font-size:11px;line-height:1.5;color:#637087;margin-top:3px}
.shape-play{display:flex;flex-shrink:0;color:var(--blue)}
.shape-play svg{width:11px;height:11px;fill:currentColor}
.shape-faders{margin:16px 0 0 45px;font-size:13px;color:#47638d}
.shape-faders summary{cursor:pointer;line-height:1.5;padding:8px 0}
.shape-faders p{font-size:13px;line-height:1.65;color:#637087;margin:8px 0 0}
@media(max-width:480px){.shape-options{grid-template-columns:1fr}.shape-options button{min-height:54px}.shape-options small{font-size:12px}.shape-faders summary{min-height:44px}}