/* ============================================================
   MINIMAL CAMERA-MAKER THEME: white, hairlines, light type,
   black pill buttons, one red dot. Mobile-first, bottom tab bar.
   ============================================================ */
:root{
  --bg:#ffffff; --bg-2:#f4f4f4; --bg-3:#fafafa;
  --ink:#1a1a1a; --ink-2:#4a4a4a; --ink-3:#8a8a8a;
  --line:#e3e3e3; --line-2:#cfcfcf;
  --red:#d9242b;
  --ok:#2f7d4f; --bad:#c62828;
  --radius:2px;
  --font-body:"Inter",system-ui,-apple-system,"Segoe UI",Helvetica,Arial,sans-serif;
  --font-mono:"DM Mono",ui-monospace,Menlo,monospace;
  --nav-h:62px;
  color-scheme:light;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto} *,*::before,*::after{animation:none!important;transition:none!important}}
body{margin:0;font-family:var(--font-body);font-weight:300;color:var(--ink);background:var(--bg);line-height:1.6;font-size:16px;-webkit-font-smoothing:antialiased;padding-bottom:calc(var(--nav-h) + env(safe-area-inset-bottom))}
a{color:var(--ink)}
h1,h2,h3,h4{font-weight:400;line-height:1.15;margin:0 0 .4em;color:var(--ink);letter-spacing:-.01em}
h1{font-size:clamp(2rem,6vw,3.2rem);font-weight:300}
h1 em{font-style:normal;font-weight:500}
h2{font-size:clamp(1.4rem,3.5vw,1.9rem);font-weight:300}
h3{font-size:1.05rem;font-weight:500}
b,strong{font-weight:500}
p{margin:.3em 0 .9em}
code,kbd{font-family:var(--font-mono);font-size:.88em;background:var(--bg-2);padding:.05em .4em;border-radius:3px}
button{font-family:inherit}
.sr{position:absolute;left:-9999px}
.dot::before{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--red);margin-right:8px;vertical-align:middle}

/* ---------- Navigation ---------- */
.nav{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.nav-in{max-width:1400px;margin:0 auto;padding:0 20px;height:var(--nav-h);display:flex;align-items:center;gap:14px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:500;font-size:1rem;white-space:nowrap;letter-spacing:-.01em;margin:0 auto}
.brand svg{width:22px;height:22px;color:var(--ink)}
.brand em{font-style:normal;font-weight:300;color:var(--ink-2)}
.brand::after{content:"";width:8px;height:8px;border-radius:50%;background:var(--red);margin-left:2px}
.nav-links{position:fixed;left:0;right:0;bottom:0;z-index:60;display:grid;grid-template-columns:repeat(8,1fr);background:#fff;border-top:1px solid var(--line);padding:6px 2px calc(6px + env(safe-area-inset-bottom))}
.nav-links a{display:flex;flex-direction:column;align-items:center;gap:4px;text-decoration:none;color:var(--ink-3);font-size:.56rem;font-weight:400;letter-spacing:.02em;padding:6px 2px;min-height:48px;justify-content:center;white-space:nowrap;position:relative}
.nav-links a svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.4;stroke-linecap:round;stroke-linejoin:round}
.nav-links a.active{color:var(--ink)}
.nav-links a.active::after{content:"";position:absolute;top:2px;right:calc(50% - 16px);width:6px;height:6px;border-radius:50%;background:var(--red)}
@media (min-width:900px){
  body{padding-bottom:40px}
  .nav-in{gap:0}
  .brand{margin:0 22px 0 0;order:0}
  .nav-links{position:static;display:flex;gap:4px;background:transparent;border:0;padding:0;order:1}
  .nav-links a{flex-direction:row;gap:8px;font-size:.9rem;font-weight:300;color:var(--ink);padding:0 14px;min-height:var(--nav-h);border-bottom:2px solid transparent;margin-bottom:-1px}
  .nav-links a svg{display:none}
  .nav-links a.active{border-bottom-color:var(--ink);font-weight:500}
  .nav-links a.active::after{display:none}
  .ring{position:static;margin-left:auto;order:3}
}
@media (min-width:1280px){.brand{position:absolute;left:50%;transform:translateX(-50%);margin:0}}

/* ---------- Layout ---------- */
.wrap{max-width:1400px;margin:0 auto;padding:22px 20px 40px}
.view{display:none}.view.active{display:block;animation:fade .25s ease}
@keyframes fade{from{opacity:0}to{opacity:1}}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.g-side{grid-template-columns:1fr}
@media (min-width:820px){.g-side{grid-template-columns:minmax(0,1.3fr) minmax(280px,1fr)}}
.eyebrow{font-size:.78rem;color:var(--ink-3);display:flex;align-items:center;gap:8px;font-weight:400}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--red)}
.lead{font-size:1.05rem;color:var(--ink-2);max-width:64ch;font-weight:300}

/* ---------- Notice bar (home) ---------- */
.notice{background:var(--bg-2);border-bottom:1px solid var(--line);margin:-22px -20px 0;padding:12px 20px;display:flex;align-items:center;gap:12px;font-size:.86rem;color:var(--ink-2)}
.notice b{font-weight:500;color:var(--ink)}
.notice .t{flex:1;min-width:0}.notice .btn{margin-left:auto;flex:none}
@media (max-width:520px){.notice{font-size:.8rem;gap:8px}.notice .btn{padding:0 12px}}

/* ---------- Panels ---------- */
.panel{background:#fff;color:var(--ink);border:1px solid var(--line);border-radius:var(--radius);padding:20px;position:relative}
.panel.dark{background:var(--ink);color:#fff;border-color:var(--ink)}
.panel.dark h2,.panel.dark h3{color:#fff}
.panel .tag{position:absolute;top:-10px;left:16px;background:#fff;color:var(--ink-3);font-size:.68rem;padding:1px 8px;border:1px solid var(--line)}
.band{margin:-20px -20px 16px;padding:12px 20px;border-bottom:1px solid var(--line);font-weight:500;font-size:.95rem;color:var(--ink);display:flex;align-items:center;gap:8px}
.band::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--red)}
.panel.dark .band{border-color:rgba(255,255,255,.15);color:#fff}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;font-family:var(--font-body);font-weight:500;font-size:.85rem;padding:0 20px;height:42px;border-radius:999px;border:1px solid var(--ink);background:var(--ink);color:#fff;text-decoration:none;transition:background .12s,color .12s;white-space:nowrap}
.btn:hover{background:#333}
.btn.primary{background:var(--ink)}
.btn.aqua{background:#fff;color:var(--ink)}
.btn.ghost{background:#fff;color:var(--ink)}
.btn.ghost:hover,.btn.aqua:hover{background:var(--bg-2)}
.btn.sm{height:34px;padding:0 14px;font-size:.76rem}
.btn[disabled]{opacity:.4;cursor:not-allowed}
.btn.on{background:var(--red);border-color:var(--red);color:#fff}
.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}

/* ---------- Hero (image tile with caption) ---------- */
.hero{position:relative;overflow:hidden;margin:0 -20px 28px;background:#111;min-height:420px;display:flex;align-items:flex-end}
.hero .scene{position:absolute;inset:0;background:url(assets/scenes/sunset-sunny.jpg) center 35%/cover no-repeat;filter:brightness(.85)}
.hero .subject{position:absolute;inset:0;display:flex;align-items:flex-end;justify-content:center;pointer-events:none}
.hero .subject img{height:70%;transform:translate(62%,8%);opacity:.95}
@media (min-width:600px){.hero .subject img{height:92%;transform:translate(40%,6%)}}
@media (min-width:900px){.hero{min-height:560px}.hero .subject img{transform:translate(30%,6%);height:100%}}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 30%,rgba(0,0,0,.72) 100%)}
.hero .copy{position:relative;z-index:2;padding:30px 20px;max-width:620px;color:#fff}
.hero .copy h1,.hero .copy .lead,.hero .copy .eyebrow{color:#fff}
.hero .copy .eyebrow{color:rgba(255,255,255,.8)}
.hero .btn{background:#fff;color:var(--ink);border-color:#fff}
.hero .btn.ghost{background:transparent;color:#fff;border-color:#fff}
.hero .flora{display:none}

/* ---------- Path: image tiles with captions (like the menu tiles) ---------- */
.path{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;counter-reset:step}
.pcard{position:relative;display:block;text-decoration:none;color:#fff;aspect-ratio:1/1;overflow:hidden;background:#222 center/cover no-repeat;padding:16px;display:flex;flex-direction:column;justify-content:flex-end}
.pcard::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(0,0,0,.7) 100%);transition:background .2s}
.pcard:hover::after{background:linear-gradient(180deg,rgba(0,0,0,.1) 0,rgba(0,0,0,.75) 100%)}
.pcard>*{position:relative;z-index:2}
.pcard::before{counter-increment:step;content:"0" counter(step);position:absolute;top:12px;left:14px;z-index:2;font-family:var(--font-mono);font-size:.68rem;color:#fff;opacity:.85}
.pcard h3{margin:0 0 2px;color:#fff;font-weight:500;font-size:1.05rem}
.pcard p{margin:0;font-size:.82rem;color:rgba(255,255,255,.85);font-weight:300}
.pcard[href="#/q2"]{background-image:url(assets/scenes/day-sunny.jpg)}
.pcard[href="#/triangle"]{background-image:url(assets/scenes/sunset-sunny.jpg)}
.pcard[href="#/sim"]{background-image:url(assets/scenes/night-sunny.jpg)}
.pcard[href="#/compose"]{background-image:url(assets/scenes/day-snowy.jpg)}
.pcard[href="#/light"]{background-image:url(assets/scenes/sunset-rainy.jpg)}
.pcard[href="#/park"]{background-image:url(assets/scenes/day-rainy.jpg)}
.pcard[href="#/model"]{background-image:url(assets/model/harbour.jpg)}

/* ---------- Lesson text ---------- */
.lesson{max-width:76ch}
.lesson ul{padding-left:1.2em}.lesson li{margin:.35em 0}
.callout{border-left:2px solid var(--red);background:var(--bg-3);padding:10px 14px;margin:12px 0}
.term{border-bottom:1px dotted var(--ink-3);cursor:help;position:relative}
.term:hover::after,.term:focus::after{content:attr(data-tip);position:absolute;left:0;top:1.6em;z-index:20;background:var(--ink);color:#fff;font-size:.82rem;font-weight:300;padding:8px 10px;width:min(300px,70vw)}
.tabs{display:flex;gap:0;margin:0 -20px 20px;padding:0 20px;overflow-x:auto;scrollbar-width:none;border-bottom:1px solid var(--line);-webkit-overflow-scrolling:touch}
.tabs::-webkit-scrollbar{display:none}
.tabs button{flex:none;cursor:pointer;background:transparent;border:0;border-bottom:2px solid transparent;margin-bottom:-1px;color:var(--ink-2);padding:12px 14px;font-weight:300;font-size:.9rem;min-height:44px}
.tabs button.on{color:var(--ink);border-bottom-color:var(--ink);font-weight:500}
.subview{display:none}.subview.on{display:block}

/* ---------- Supermodel ---------- */
.mscenes{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 16px}
.mscenes button{cursor:pointer;background:#fff;border:1px solid var(--line-2);color:var(--ink);border-radius:999px;padding:7px 12px;font-size:.78rem;font-family:inherit}
.mscenes button.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.mstage{position:relative;width:100%;aspect-ratio:3/2;overflow:hidden;background:var(--bg-2);border:1px solid var(--line);user-select:none}
.mstage.portrait{aspect-ratio:2/3;max-width:460px;margin:0 auto}
.mstage img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.mstage .mhot{position:absolute;width:26px;height:26px;border-radius:50%;background:#fff;color:var(--ink);border:1px solid var(--ink);display:grid;place-items:center;font-size:.7rem;font-weight:600;cursor:pointer;transform:translate(-50%,-50%);box-shadow:0 2px 8px rgba(0,0,0,.25);transition:transform .15s}
.mstage .mhot.on{background:var(--red);color:#fff;border-color:var(--red);transform:translate(-50%,-50%) scale(1.15)}
.mstage .mlabel{position:absolute;left:10px;bottom:10px;background:rgba(0,0,0,.6);color:#fff;font-size:.68rem;padding:4px 10px;border-radius:999px;letter-spacing:.04em}
.minfo h3{margin:0 0 6px;font-size:1.05rem}
.minfo p{margin:0 0 8px;font-size:.95rem}
.minfo ul{margin:0;padding-left:1.1em;font-size:.95rem}.minfo li{margin:.3em 0}
.say{list-style:none;padding:0;margin:0;display:grid;gap:6px}
.say li{background:var(--bg-2);border-left:2px solid var(--red);padding:8px 12px;font-size:.95rem;font-style:italic}
.director{display:grid;gap:10px}
.director .cue{display:grid;grid-template-columns:90px 1fr;gap:10px;align-items:start;padding:8px 0;border-bottom:1px dashed var(--line)}
.director .cue b{font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);padding-top:3px}
.director .cue span{font-size:1rem}
.mnext{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}

/* ---------- Cue cards ---------- */
.deck{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px}
.card{perspective:1200px;min-height:200px;cursor:pointer}
.card .in{position:relative;width:100%;height:100%;min-height:200px;transition:transform .5s;transform-style:preserve-3d}
.card.flip .in{transform:rotateY(180deg)}
.face{position:absolute;inset:0;backface-visibility:hidden;padding:18px;border:1px solid var(--line);display:flex;flex-direction:column;justify-content:center;background:#fff}
.face.b{background:var(--ink);color:#fff;border-color:var(--ink);transform:rotateY(180deg);justify-content:flex-start;font-size:.88rem;font-weight:300}
.face.f h3{font-size:1.4rem;margin:0;font-weight:300}
.face.f small{font-size:.62rem;letter-spacing:.1em;color:var(--ink-3);text-transform:uppercase}
.face .cue{font-family:var(--font-mono);font-size:.7rem;color:rgba(255,255,255,.75);margin-top:auto;padding-top:8px}
.face .q2{font-size:.8rem;color:rgba(255,255,255,.8);margin-top:6px}

/* ---------- Simulator ---------- */
.sim{display:grid;grid-template-columns:1fr;gap:16px;align-items:start}
@media (min-width:900px){.sim{grid-template-columns:minmax(0,1.5fr) minmax(320px,1fr);gap:24px}}
.viewfinder{background:var(--ink);padding:6px}
.frame{position:relative;width:100%;aspect-ratio:3/2;overflow:hidden;background:#000;isolation:isolate}
.frame.portrait{aspect-ratio:2/3;max-width:520px;margin:0 auto}
.layer{position:absolute;inset:0}
.layer.bg{background:url(assets/scenes/day-sunny.jpg) center/cover no-repeat;will-change:filter}
.layer.subj{display:flex;align-items:flex-end;justify-content:center}
.layer.subj img{height:112%;width:auto;transform-origin:bottom center;transform:translateY(8%);will-change:filter,transform}
.layer.fg{background:url(assets/foliage.png) left bottom/60% auto no-repeat;pointer-events:none;opacity:0}
.layer.grade{pointer-events:none;mix-blend-mode:multiply}
.layer.glow{pointer-events:none;mix-blend-mode:screen}
.layer.noise{pointer-events:none;opacity:0;background-repeat:repeat;mix-blend-mode:overlay}
.layer.clip{pointer-events:none;background:#fff;opacity:0;mix-blend-mode:screen}
.layer.vign{pointer-events:none;background:radial-gradient(ellipse at center,transparent 55%,rgba(0,0,0,.35) 100%)}
.layer.afbox{pointer-events:none}
.afbox i{position:absolute;left:50%;top:26%;width:70px;height:70px;transform:translate(-50%,-50%);border:2px solid #fff;box-shadow:0 0 0 1px rgba(0,0,0,.4)}
.afbox i::before{content:"AF";position:absolute;top:-16px;left:0;font-family:var(--font-mono);font-size:.55rem;color:#fff}
.layer.scan{pointer-events:none;background:repeating-linear-gradient(180deg,rgba(255,255,255,.025) 0 2px,transparent 2px 4px);opacity:.5}
.layer.wx{pointer-events:none;opacity:0}
.layer.wx.rain{opacity:.5;background:repeating-linear-gradient(100deg,transparent 0 6px,rgba(255,255,255,.35) 6px 7px,transparent 7px 13px);background-size:140px 140px;animation:rain .35s linear infinite}
@keyframes rain{to{background-position:-40px 140px}}
.layer.wx.snow{opacity:.85;background-image:radial-gradient(2px 2px at 20px 30px,#fff 60%,transparent 61%),radial-gradient(1.5px 1.5px at 70px 90px,#fff 60%,transparent 61%),radial-gradient(2.5px 2.5px at 120px 50px,#fff 60%,transparent 61%),radial-gradient(1.5px 1.5px at 160px 130px,#fff 60%,transparent 61%),radial-gradient(2px 2px at 40px 150px,#fff 60%,transparent 61%);background-size:190px 190px;animation:snow 6s linear infinite}
@keyframes snow{to{background-position:30px 190px}}
.layer.wx.storm{opacity:0;background:#fff;animation:storm 7s ease-in-out infinite}
@keyframes storm{0%,88%,100%{opacity:0}89%{opacity:.75}90%{opacity:0}92%{opacity:.5}93%{opacity:0}}
.frame .thirds{position:absolute;inset:0;pointer-events:none;display:none;background:
  linear-gradient(90deg,transparent calc(33.33% - .5px),rgba(255,255,255,.5) calc(33.33% - .5px),rgba(255,255,255,.5) calc(33.33% + .5px),transparent calc(33.33% + .5px),transparent calc(66.66% - .5px),rgba(255,255,255,.5) calc(66.66% - .5px),rgba(255,255,255,.5) calc(66.66% + .5px),transparent calc(66.66% + .5px)),
  linear-gradient(180deg,transparent calc(33.33% - .5px),rgba(255,255,255,.5) calc(33.33% - .5px),rgba(255,255,255,.5) calc(33.33% + .5px),transparent calc(33.33% + .5px),transparent calc(66.66% - .5px),rgba(255,255,255,.5) calc(66.66% - .5px),rgba(255,255,255,.5) calc(66.66% + .5px),transparent calc(66.66% + .5px))}
.readout{margin-top:6px;background:#000;padding:9px 12px;font-family:var(--font-mono);color:#fff;display:flex;flex-wrap:wrap;gap:6px 14px;align-items:center;font-size:.78rem}
.readout b{color:#fff;font-weight:500}
.readout .mode{background:var(--red);color:#fff;padding:1px 7px}
.readout .warn{color:var(--red)}
.meter{display:inline-flex;align-items:center;gap:2px}
.meter i{width:5px;height:12px;background:#444}
.meter i.on{background:#fff}.meter i.z{height:16px}.meter i.over{background:var(--red)}.meter i.under{background:#9ad}
.hist{margin-top:6px;display:grid;grid-template-columns:1fr;gap:6px;align-items:stretch}
@media (min-width:600px){.hist{grid-template-columns:1fr 160px}}
.hist canvas{width:100%;height:70px;background:#000;display:block}
.dofscale{background:#000;padding:8px 10px;font-family:var(--font-mono);font-size:.6rem;color:#ddd;display:flex;flex-direction:column;justify-content:center;gap:4px}
.dofscale .bar{position:relative;height:8px;background:#333;overflow:hidden}
.dofscale .bar i{position:absolute;top:0;bottom:0;background:#fff}
.dofscale .bar b{position:absolute;top:-2px;width:2px;height:12px;background:var(--red)}
.controls{display:grid;gap:0;border:1px solid var(--line)}
.ctl{background:#fff;color:var(--ink);border-bottom:1px solid var(--line);padding:14px 16px}
.ctl:last-child{border-bottom:0}
.ctl.apert,.ctl.shut,.ctl.iso{border-left:2px solid var(--ink)}
.ctl label{display:flex;justify-content:space-between;align-items:center;gap:8px;font-weight:500;font-size:.82rem;color:var(--ink)}
.ctl label output{font-family:var(--font-mono);font-size:.95rem;font-weight:400;background:var(--bg-2);color:var(--ink);padding:3px 10px;min-width:84px;text-align:center}
.ctl label output.auto{color:var(--red)}
.ctl .hintline{margin-top:2px;display:flex;justify-content:space-between;font-size:.66rem;color:var(--ink-3)}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:36px;background:transparent;margin:4px 0 0;cursor:pointer;touch-action:pan-y}
input[type=range]:focus{outline:none}
input[type=range]::-webkit-slider-runnable-track{height:2px;background:var(--line-2)}
input[type=range]::-moz-range-track{height:2px;background:var(--line-2)}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:26px;height:26px;margin-top:-12px;border-radius:50%;background:var(--ink);border:3px solid #fff;box-shadow:0 0 0 1px var(--ink)}
input[type=range]::-moz-range-thumb{width:22px;height:22px;border-radius:50%;background:var(--ink);border:3px solid #fff;box-shadow:0 0 0 1px var(--ink)}
input[type=range]:focus-visible::-webkit-slider-thumb{box-shadow:0 0 0 2px var(--red)}
input[type=range][disabled]{opacity:.35;cursor:not-allowed}
.seg{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.seg button{cursor:pointer;border:1px solid var(--line-2);background:#fff;color:var(--ink);border-radius:999px;padding:0 14px;height:36px;font-weight:400;font-size:.76rem}
.seg button.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.seg.sm button{padding:0 12px;height:34px;font-size:.72rem}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.chip{display:inline-flex;align-items:center;gap:5px;font-size:.72rem;padding:5px 11px;border-radius:999px;border:1px solid var(--line-2);background:#fff;color:var(--ink-2)}
.chip.bad{border-color:var(--bad);color:var(--bad)}
.chip.good{border-color:var(--ink);color:var(--ink)}
.coach{background:#fff;border:1px solid var(--line);padding:14px 16px;font-size:.92rem}
.coach h3{color:var(--ink-3);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;margin-bottom:6px;font-weight:500;display:flex;align-items:center;gap:8px}
.coach h3::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--red)}
.coach .big{font-size:1.25rem;color:var(--ink);margin:0 0 6px;font-weight:300}
.equiv{font-family:var(--font-mono);font-size:.68rem;display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:4px;margin-top:6px}
.equiv span{background:rgba(255,255,255,.08);padding:6px 8px;cursor:pointer;border:1px solid transparent}
.equiv span:hover{border-color:#fff}
.equiv span.cur{background:#fff;color:var(--ink)}
.chal{display:grid;gap:0;border:1px solid rgba(255,255,255,.15)}
.chal .c{background:var(--ink);color:#fff;border-bottom:1px solid rgba(255,255,255,.15);padding:10px 12px;display:grid;grid-template-columns:1fr auto;gap:8px;align-items:center}
.chal .c:last-child{border-bottom:0}
.chal .c b{font-weight:500;font-size:.88rem}
.chal .c p{margin:2px 0 0;font-size:.8rem;color:rgba(255,255,255,.7);font-weight:300}
.chal .btn{background:#fff;color:var(--ink);border-color:#fff}
.chal .btn.on{background:var(--red);border-color:var(--red);color:#fff}
.result{margin-top:8px;padding:8px 12px;font-size:.85rem}
.result.ok{background:#fff;color:var(--ok)}
.result.no{background:#fff;color:var(--bad)}
.triangle{width:100%;max-width:420px;margin:0 auto;display:block}

/* ---------- Composition board ---------- */
.board{position:relative;width:100%;aspect-ratio:3/2;overflow:hidden;background:url(assets/scenes/day-sunny.jpg) center/cover;touch-action:none;user-select:none}
.board.portrait{aspect-ratio:2/3;max-width:440px;margin:0 auto}
.board img{position:absolute;left:50%;top:60%;height:85%;width:auto;transform:translate(-50%,-50%);cursor:grab;filter:drop-shadow(0 8px 10px rgba(0,0,0,.35))}
.board img:active{cursor:grabbing}
.ov{position:absolute;inset:0;pointer-events:none;display:none}
.ov.on{display:block}
.ov.thirds{background:
  linear-gradient(90deg,transparent calc(33.33% - .5px),rgba(255,255,255,.7) calc(33.33% - .5px),rgba(255,255,255,.7) calc(33.33% + .5px),transparent calc(33.33% + .5px),transparent calc(66.66% - .5px),rgba(255,255,255,.7) calc(66.66% - .5px),rgba(255,255,255,.7) calc(66.66% + .5px),transparent calc(66.66% + .5px)),
  linear-gradient(180deg,transparent calc(33.33% - .5px),rgba(255,255,255,.7) calc(33.33% - .5px),rgba(255,255,255,.7) calc(33.33% + .5px),transparent calc(33.33% + .5px),transparent calc(66.66% - .5px),rgba(255,255,255,.7) calc(66.66% - .5px),rgba(255,255,255,.7) calc(66.66% + .5px),transparent calc(66.66% + .5px))}
.ov.centre{background:linear-gradient(90deg,transparent calc(50% - .5px),rgba(217,36,43,.9) calc(50% - .5px),rgba(217,36,43,.9) calc(50% + .5px),transparent calc(50% + .5px)),linear-gradient(180deg,transparent calc(50% - .5px),rgba(217,36,43,.9) calc(50% - .5px),rgba(217,36,43,.9) calc(50% + .5px),transparent calc(50% + .5px))}
.ov.golden{background:
  linear-gradient(90deg,transparent calc(38.2% - .5px),rgba(255,255,255,.9) calc(38.2% - .5px),rgba(255,255,255,.9) calc(38.2% + .5px),transparent calc(38.2% + .5px),transparent calc(61.8% - .5px),rgba(255,255,255,.9) calc(61.8% - .5px),rgba(255,255,255,.9) calc(61.8% + .5px),transparent calc(61.8% + .5px)),
  linear-gradient(180deg,transparent calc(38.2% - .5px),rgba(255,255,255,.9) calc(38.2% - .5px),rgba(255,255,255,.9) calc(38.2% + .5px),transparent calc(38.2% + .5px),transparent calc(61.8% - .5px),rgba(255,255,255,.9) calc(61.8% - .5px),rgba(255,255,255,.9) calc(61.8% + .5px),transparent calc(61.8% + .5px))}
.ov.head{border-top:12% solid rgba(217,36,43,.25)}
.ov.eye{position:absolute;left:0;right:0;height:2px;background:#fff;box-shadow:0 0 6px rgba(0,0,0,.5);display:none}
.ov.eye.on{display:block}
.ov.eye::after{content:"EYES";position:absolute;right:6px;top:-14px;font-family:var(--font-mono);font-size:.55rem;color:#fff}

/* ---------- Lighting ---------- */
.lightstage{position:relative;width:100%;aspect-ratio:3/2;overflow:hidden;background:url(assets/scenes/sunset-sunny.jpg) center/cover}
.lightstage .sb{position:absolute;inset:0;display:flex;align-items:flex-end;justify-content:center}
.lightstage .sb img,.lightstage .sb canvas{height:110%;width:auto;transform:translateY(8%)}
.lightstage .shade,.lightstage .hl,.lightstage .halo{position:absolute;inset:0;display:flex;align-items:flex-end;justify-content:center;pointer-events:none}
.lightstage .shade i,.lightstage .hl i,.lightstage .halo i{display:block;height:110%;aspect-ratio:564/1500;transform:translateY(8%);-webkit-mask:url(assets/mommy.png) center/contain no-repeat;mask:url(assets/mommy.png) center/contain no-repeat}
.lightstage .hl{mix-blend-mode:screen}
.lightstage .halo i{background:#fff3d6;filter:blur(9px);transform:translateY(8%) scale(1.05);opacity:0;transition:opacity .4s}
.lightstage .gshadow{position:absolute;left:50%;bottom:4%;width:42%;height:9%;margin-left:-4%;background:radial-gradient(ellipse at 10% 50%,rgba(0,0,0,.6),rgba(0,0,0,.35) 40%,rgba(0,0,0,0) 72%);transform-origin:10% 50%;pointer-events:none;transition:transform .4s,opacity .4s;filter:blur(2px)}
.lightstage .wash{position:absolute;inset:0;pointer-events:none}
.lightstage .sunicon{position:absolute;width:46px;height:46px;border-radius:50%;background:radial-gradient(circle,#fff6c7,#f5c54a 55%,#e07a3a);box-shadow:0 0 30px 10px rgba(255,230,170,.6);transition:all .5s}
.lightstage .label{position:absolute;left:10px;bottom:10px;font-family:var(--font-mono);font-size:.62rem;color:#fff;background:rgba(0,0,0,.7);padding:4px 8px}
.dial{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;max-width:300px;margin-top:8px}
.dial button{cursor:pointer;border:1px solid var(--line-2);background:#fff;padding:10px 4px;font-weight:400;font-size:.68rem;color:var(--ink);min-height:44px}
.dial button.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.depthstage{position:relative;width:100%;aspect-ratio:3/2;overflow:hidden;background:#000}

/* ---------- Q2 diagram ---------- */
.diagram{background:var(--ink);padding:12px}
.diagram svg{width:100%;height:auto;display:block}
.hot{cursor:pointer}
.hot circle{fill:var(--red);stroke:#fff;stroke-width:2;transition:transform .15s;transform-box:fill-box;transform-origin:center}
.hot:hover circle,.hot.on circle{fill:#fff;transform:scale(1.2)}
.hot:hover text,.hot.on text{fill:var(--ink)}
.hot text{fill:#fff;font-family:var(--font-mono);font-size:11px;font-weight:500;pointer-events:none}
.hotinfo{min-height:120px}
.hotinfo h3{color:#fff;font-weight:500}
.spec{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.spec div{background:#fff;color:var(--ink);padding:14px}
.spec div b{display:block;font-size:.66rem;letter-spacing:.08em;color:var(--ink-3);text-transform:uppercase;margin-bottom:4px;font-weight:500}
.spec div span{font-size:.9rem}
.recipe{counter-reset:r;padding:0;margin:0}
.recipe li{list-style:none;position:relative;padding:12px 8px 12px 44px;border-bottom:1px solid var(--line)}
.recipe li:last-child{border-bottom:0}
.recipe li::before{counter-increment:r;content:counter(r);position:absolute;left:2px;top:12px;width:26px;height:26px;border-radius:50%;background:var(--ink);color:#fff;display:grid;place-items:center;font-size:.72rem}
.recipe li b{font-weight:500;display:block}

/* ---------- Cheat sheet ---------- */
.check{list-style:none;padding:0;margin:0}
.check li{display:flex;gap:10px;align-items:flex-start;padding:9px 0;border-bottom:1px solid var(--line)}
.check li:last-child{border-bottom:0}
.check input{width:20px;height:20px;accent-color:var(--ink);margin-top:2px;flex:none}
.check li.done span{text-decoration:line-through;opacity:.45}
@media print{body{background:#fff;color:#000;padding:0}.nav,.nav-links,.noprint{display:none!important}.panel{border-color:#000;break-inside:avoid}.view{display:none!important}.view.active{display:block!important}.wrap{padding:0}}

footer{margin-top:40px;padding-top:16px;border-top:1px solid var(--line);text-align:center;font-size:.78rem;color:var(--ink-3)}
.toast{position:fixed;left:50%;bottom:calc(var(--nav-h) + 16px);transform:translateX(-50%) translateY(140%);background:var(--ink);color:#fff;padding:10px 18px;border-radius:999px;font-weight:400;font-size:.8rem;transition:transform .3s;z-index:99;white-space:nowrap}
.toast.show{transform:translateX(-50%) translateY(0)}
@media (min-width:900px){.toast{bottom:22px}}

/* Audit repairs: fluid grids, legible type, real touch targets. */
:root{--ink-3:#686868;--nav-h:64px}
html{scroll-behavior:auto;scroll-padding-top:80px}
[hidden]{display:none!important}
*{min-width:0}
body{font-weight:400}
button,a,input{ -webkit-tap-highlight-color:transparent }
button{touch-action:manipulation}
:focus-visible{outline:2px solid var(--red);outline-offset:4px}
input[type=range]{height:44px}
input[type=range]:focus-visible{outline:2px solid var(--red);outline-offset:2px}
button:not(.mhot){min-height:44px}
.btn,.btn.sm{height:auto;min-height:44px;white-space:normal;padding:10px 16px;text-align:center}
.seg button,.seg.sm button{height:auto;min-height:44px;font-size:.82rem;padding:8px 13px}
.g2{grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr))}
.grid>*,.sim>*{min-width:0}
.wrap{padding-bottom:32px}
.skip-link{position:fixed;left:12px;top:-80px;z-index:100;background:#fff;padding:12px;border:2px solid #111}
.skip-link:focus{top:8px}
.no-script{padding:20px;background:#fff4de}
.view.active{animation:none}
.brand{position:static;transform:none;margin:0 auto;order:0;font-weight:500}
.nav-in{position:relative;gap:12px;justify-content:space-between}
.nav-links{grid-template-columns:repeat(5,1fr);padding:4px 4px calc(4px + env(safe-area-inset-bottom));gap:0}
.nav-links a,.nav-links #more-nav{font-size:.66rem;letter-spacing:0;min-height:56px;padding:5px 2px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px}
#more-nav{border:0;background:white;color:var(--ink-3);font-family:inherit;cursor:pointer}
#more-nav span{font-size:23px;line-height:22px}
#more-nav.active,#more-nav[aria-expanded=true]{color:var(--ink);background:var(--bg-2)}
.nav-links a.active::after{top:2px;right:calc(50% - 18px)}
.more-menu{position:fixed;bottom:calc(68px + env(safe-area-inset-bottom));right:12px;left:12px;z-index:65;background:#fff;border:1px solid var(--line);box-shadow:0 -8px 30px #0002;padding:10px;display:grid;grid-template-columns:1fr 1fr;gap:6px;border-radius:12px}
.more-menu a{display:flex;align-items:center;gap:10px;min-height:50px;padding:10px;text-decoration:none;font-size:.95rem;border-radius:6px}
.more-menu a.active{background:var(--bg-2);font-weight:600}
.more-menu a svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.4}
body{padding-bottom:calc(72px + env(safe-area-inset-bottom))}
.toast{white-space:normal;max-width:calc(100vw - 32px);width:max-content;text-align:center;border-radius:12px;bottom:calc(80px + env(safe-area-inset-bottom))}
.hero .copy{background:linear-gradient(0deg,#000b,#0002);width:100%}
.hero .copy .lead{font-size:1rem;line-height:1.65}
.hero .copy h1{font-size:clamp(2rem,6vw,3.3rem)}
.hero .subject img{transform:translate(35%,3%);height:92%}
.path{grid-template-columns:repeat(auto-fit,minmax(min(100%,250px),1fr))}
.pcard{aspect-ratio:4/3;min-height:220px}
.pcard::after{background:linear-gradient(180deg,transparent 10%,#000c 100%)}
.pcard p{font-weight:400;line-height:1.55}
.tabs{gap:4px;scrollbar-width:thin;scroll-snap-type:x proximity;overscroll-behavior-x:contain}
.tabs button{font-weight:400;scroll-snap-align:start}
.tabs button.on{background:var(--bg-3)}
.tabs::after{content:'';flex:0 0 12px}
.ctl label{font-size:.9rem;flex-wrap:wrap}
.ctl .hintline{font-size:.72rem;gap:10px;line-height:1.45}
.mode-help{font-size:.84rem;line-height:1.5;color:var(--ink-2);margin:10px 0 0}
.sim-preview{position:sticky;top:78px;z-index:15;background:#fff;padding-bottom:8px}
.sim-feedback{margin-top:20px;display:grid;gap:16px}
.sim-feedback .coach,.sim-feedback .panel{margin-top:0!important}
.sim-workbench{scroll-margin-top:78px}
.preview-status{font-size:.74rem;line-height:1.4;color:var(--ink-2);margin:6px 0}
.preview-actions{display:flex;gap:6px;flex-wrap:wrap}
.preview-actions .btn{font-size:.74rem;padding:7px 10px;min-height:40px}
.hist-details summary{color:#ddd;font-size:.74rem;cursor:pointer;padding:6px 4px}
.reference-photo{position:absolute;inset:0;background:#000;z-index:20;overflow:hidden;pointer-events:none}
.reference-frame{position:absolute;left:50%;top:50%;transform-origin:center}
.reference-frame *{animation:none!important}
.reference-photo::after{content:'SAVED REFERENCE';position:absolute;top:8px;left:8px;background:#fff;color:#111;padding:3px 8px;font:11px monospace}
.equiv button{color:#fff;font:inherit;background:#ffffff18;border:1px solid #ffffff30;text-align:left;cursor:pointer;padding:8px}
.equiv button:hover{border-color:#fff}
.equiv button.cur{background:#fff;color:#111}
.ov.head{border:0;background:linear-gradient(180deg,#d9242b55 0 12%,transparent 12%)}
.board{touch-action:pan-y}
.board img{touch-action:none}
.visual-preview{position:sticky;top:78px;z-index:10;background:white}
.workbench-feedback{margin:16px 0}
.workbench-feedback .coach{margin-top:8px!important}
.q2-hotspot-list{display:flex;flex-wrap:wrap;gap:8px;padding-top:12px}
.hotspot-choice{border:1px solid #777;background:#222;color:#fff;padding:8px 12px;font-family:inherit;font-size:.84rem;cursor:pointer;border-radius:6px}
.hotspot-choice.on{background:#fff;color:#111}
.diagram svg:focus-within{outline:1px solid #fff}
.card{min-height:240px}
.card .in{display:grid;min-height:240px;height:auto}
.card .face{position:relative;grid-area:1/1;min-height:240px}
.card .face.b{font-size:.95rem}
.face .cue{font-size:.8rem;line-height:1.5}
.card.flip .face.f{visibility:hidden}
.card:not(.flip) .face.b{visibility:hidden}
.mscenes{gap:8px}
.mscenes button{font-size:.84rem;padding:8px 13px}
.mstage .mhot{width:38px;height:38px;font-size:.85rem}
.mstage .mhot::before{content:'';position:absolute;inset:-3px;border-radius:50%}
.mstage .mlabel{max-width:calc(100% - 20px);font-size:.74rem}
.mnext .btn{flex:1}
.minfo{border:0}
#view-model .controls>.tabs{margin:0;padding:0}
.check input{width:24px;height:24px;margin-top:3px}
.check label{display:block;cursor:pointer;min-height:44px;padding:3px 0}
#park-progress{padding:10px 14px;background:var(--bg-2);font-size:.9rem}
@media(max-width:1099px){
  .nav-in{height:56px;justify-content:center}
  .brand{font-size:.95rem}
  .nav-links{position:fixed;left:0;right:0;bottom:0;display:grid;background:#fff;border-top:1px solid var(--line)}
  .nav-links a svg{display:block}
  .nav-links a{color:var(--ink-3);border:0;margin:0;font-weight:400}
  .nav-links a.active{color:var(--ink);background:var(--bg-3)}
  .nav-links a.active::after{display:block}
  .wrap{padding:18px 16px 30px}
  .hero{margin:0 -16px 24px}
  .tabs{margin-left:-16px;margin-right:-16px;padding-left:16px;padding-right:16px}
  .sim{grid-template-columns:1fr;gap:12px}
  .sim-preview,.visual-preview{top:56px;box-shadow:0 4px 10px #0001}
  .sim-workbench{scroll-margin-top:56px}
  .sim-preview .frame{max-height:26svh;min-height:130px;max-width:calc(26svh * 1.5);margin:0 auto}
  .sim-preview .frame.portrait{height:26svh;width:auto;aspect-ratio:2/3;min-height:130px}
  .sim-preview .readout{font-size:.68rem;gap:4px 9px;padding:6px 8px}
  .hist-details:not([open]){margin:0}
  .visual-preview .board,.visual-preview .lightstage,.visual-preview .depthstage{max-height:28svh;min-height:150px;max-width:calc(28svh * 1.5);margin:0 auto}
  .visual-preview .board.portrait{height:28svh;width:auto;aspect-ratio:2/3}
  .coach .big{font-size:1.1rem}
  .preview-status{max-width:100%;font-size:.7rem}
  .preview-actions .btn{min-height:38px}
  .lead{font-size:1rem;line-height:1.65}
  .mscenes{flex-wrap:nowrap;overflow-x:auto;padding:4px 2px 10px;scrollbar-width:thin}
  .mscenes button{flex:none}
  .mstage.portrait{max-height:65svh;width:auto;aspect-ratio:2/3}
}
@media(min-width:1100px){
  body{padding-bottom:30px}
  .nav-in{height:70px;gap:16px;padding:0 24px}
  .brand{position:static;transform:none;margin:0;font-size:.85rem}
  .nav-links{position:static;display:flex;gap:0;border:0;padding:0;background:none;order:1;margin-left:auto}
  .nav-links a{font-size:.83rem;padding:0 10px;min-height:70px;flex-direction:row;color:var(--ink)}
  .nav-links a svg{display:none}
  #more-nav{display:none}
  .more-menu{position:static;display:flex!important;gap:0;box-shadow:none;border:0;padding:0;order:2;margin:0}
  .more-menu a{font-size:.83rem;padding:0 10px;min-height:70px;border-radius:0}
  .more-menu a svg{display:none}
  .more-menu a.active{background:none;border-bottom:2px solid #111}
  .sim{grid-template-columns:minmax(0,1.4fr) minmax(360px,1fr)}
  .sim-preview .frame{max-height:55svh;max-width:calc(55svh * 1.5);margin:0 auto}
  .preview-status{font-size:.85rem}
  .toast{bottom:20px}
}
@media(max-width:360px){
  .wrap{padding-left:12px;padding-right:12px}
  .panel{padding:16px}
  .panel .band{margin:-16px -16px 14px;padding:10px 16px}
  .nav-links a,#more-nav{font-size:.61rem}
  .preview-actions{gap:4px}
  .preview-actions .btn{font-size:.68rem;padding:6px 8px}
  .ctl{padding:12px}
}
@media(max-height:600px) and (max-width:1099px){
  .sim-preview,.visual-preview{position:static}
  .sim-preview .frame{max-height:none}
}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}
@media print{
  .sim-preview,.visual-preview{position:static}
  .preview-actions,.toast,.skip-link,.no-script{display:none!important}
  #undo-checks{display:none!important}
  .check li.done span{opacity:1}
  .check li{break-inside:avoid}
  .g2{grid-template-columns:1fr 1fr;gap:12px}
  .panel{padding:12px;font-size:10pt}
  .panel .band{margin:-12px -12px 8px;padding:8px 12px}
  footer{margin-top:16px}
}


.toast{visibility:hidden;opacity:0;pointer-events:none}
.toast.show{visibility:visible;opacity:1}
.slider-stepper{display:grid;grid-template-columns:44px minmax(0,1fr) 44px;gap:10px;align-items:center;margin:4px 0}
.slider-stepper button{border:1px solid var(--line-2);border-radius:50%;background:#fff;color:#111;font-size:1.3rem;cursor:pointer;width:44px;height:44px;padding:0}
.slider-stepper button:disabled{opacity:.3;cursor:not-allowed}
.afbox i{width:clamp(32px,8vw,70px);height:clamp(32px,8vw,70px)}
@media(min-width:1100px){.nav-links #more-nav{display:none}}
@media(max-width:1099px){.term:hover::after,.term:focus::after{position:fixed;left:16px;right:16px;top:auto;bottom:calc(82px + env(safe-area-inset-bottom));width:auto;max-width:none}}

@media(max-width:360px){.tabs{margin-left:-12px;margin-right:-12px;padding-left:12px;padding-right:12px}.hero{margin-left:-12px;margin-right:-12px}}

.mhot-caption{position:absolute;left:0;right:0;bottom:0;background:#ffffffed;padding:10px 44px 10px 12px;z-index:5;font-size:.85rem;line-height:1.5;max-height:42%;overflow:auto}
.mhot-caption p{margin:0}.mhot-caption button{position:absolute;right:2px;top:2px;background:transparent;border:0;font-size:24px;cursor:pointer;width:40px}
.mstage .mhot{z-index:6}
@media(min-width:1100px){.mhot-caption{display:none!important}}

@media(max-width:599px){
.hero{display:block;min-height:0;padding-top:230px;background:#111}
.hero .scene,.hero .subject{height:230px;bottom:auto}
.hero .subject img{height:108%;transform:translate(0,8%)}
.hero::after{display:none}
.hero .copy{background:#111;padding:22px 16px}
.hero .copy .lead{font-size:.95rem}
}

.mhot-caption{z-index:8}
.layer.scan{display:none}