:root{
  --wine:#642d35;--wine-deep:#37191e;--wine-soft:#8a4a50;--gold:#b89452;--gold-light:#dbc68f;
  --ink:#2c2823;--muted:#696158;--paper:#f8f3e8;--paper-deep:#e9dfca;--cream:#fffaf0;
  --line:rgba(72,49,27,.25);--teal:#315f62;--sky:#9db9c2;--shadow:0 14px 34px rgba(49,31,17,.18);
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;background:#cdb58a;color:var(--ink);font-family:"Source Sans 3",sans-serif}
body{background-image:linear-gradient(rgba(255,255,255,.14),rgba(82,50,22,.04)),repeating-linear-gradient(2deg,rgba(88,54,24,.08) 0 1px,transparent 1px 9px)}
body:before{content:"";position:fixed;inset:0;background:url("assets/paper-grain-overlay.webp") center/cover;opacity:.13;mix-blend-mode:multiply;pointer-events:none;z-index:100}
button,a,input{font:inherit}
button,a{-webkit-tap-highlight-color:transparent}
button:focus-visible,a:focus-visible,input:focus-visible,.landscape-stage:focus-visible{outline:3px solid var(--gold-light);outline-offset:2px}
.studio-bar{min-height:82px;background:linear-gradient(115deg,var(--wine-deep),var(--wine));color:var(--cream);display:flex;align-items:center;justify-content:space-between;gap:24px;padding:13px clamp(18px,4vw,54px);border-bottom:3px solid var(--gold);box-shadow:0 6px 20px rgba(42,22,16,.22)}
.brand-lockup{display:flex;align-items:center;gap:14px;min-width:0}.brand-mark{width:47px;height:47px;border:1px solid var(--gold-light);outline:1px solid rgba(219,198,143,.35);outline-offset:-5px;display:grid;place-items:center;font:700 24px "Cinzel",serif;color:var(--gold-light);flex:0 0 auto}
.brand-line{margin:0 0 3px;font:600 11px "Cinzel",serif;letter-spacing:.16em;text-transform:uppercase;color:var(--gold-light)}
h1{font:700 clamp(21px,3vw,31px)/1.1 "Cinzel",serif;margin:0;white-space:nowrap}
.bar-actions{display:flex;align-items:center;gap:20px}.motto{font:600 11px "Cinzel",serif;letter-spacing:.15em;text-transform:uppercase;color:#eadcbf;margin:0;white-space:nowrap}.open-full{color:var(--cream);border:1px solid rgba(255,255,255,.5);padding:8px 12px;text-decoration:none;font-weight:700;font-size:14px}.open-full:hover{background:rgba(255,255,255,.1)}
.app-shell{max-width:1500px;margin:0 auto;padding:16px clamp(12px,2.5vw,34px) 28px}
.mode-tabs{display:flex;gap:7px;margin-bottom:12px}.mode-tab{border:1px solid rgba(65,39,24,.38);background:#eadfc8;color:#44372b;padding:8px 15px;cursor:pointer;font-weight:700;display:flex;align-items:center;gap:7px}.mode-tab span{display:grid;place-items:center;width:20px;height:20px;border:1px solid currentColor;border-radius:50%;font-size:12px}.mode-tab.active{background:var(--wine);color:var(--cream);border-color:var(--wine-deep)}
.lesson-strip{background:rgba(248,243,232,.96);border:1px solid var(--line);box-shadow:0 8px 18px rgba(56,34,18,.12);display:grid;grid-template-columns:54px minmax(0,1fr) auto;align-items:center;gap:15px;padding:11px 16px;margin-bottom:13px;position:relative}.lesson-strip:after{content:"";position:absolute;left:0;bottom:0;width:33%;height:3px;background:var(--gold)}
.lesson-number{font:700 28px "Cinzel",serif;color:var(--wine);border-right:1px solid var(--line)}.lesson-kicker{margin:0;color:var(--wine-soft);font-weight:700;font-size:13px;text-transform:uppercase;letter-spacing:.1em}.lesson-copy h2{font:700 18px "Libre Baskerville",serif;margin:1px 0}.lesson-copy>p:last-child{font-size:14px;line-height:1.35;margin:0;color:var(--muted)}.lesson-controls{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:13px}.icon-button{width:34px;height:34px;border:1px solid var(--line);background:var(--cream);cursor:pointer;color:var(--wine);font-size:19px}
.workspace-grid{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(310px,.75fr);gap:14px;align-items:stretch}.stage-card,.control-card{background:rgba(248,243,232,.96);border:1px solid var(--line);box-shadow:var(--shadow)}
.stage-card{padding:13px}.stage-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}.stage-toolbar>div:first-child{display:flex;gap:8px;align-items:baseline}.stage-toolbar strong{font:700 16px "Libre Baskerville",serif;color:var(--wine-deep)}.stage-toolbar span{color:var(--muted);font-size:13px}.toolbar-actions,.button-row{display:flex;gap:7px}.small-button,.action-button{border:1px solid #a38a60;background:#f2e8d4;color:#42362b;padding:6px 10px;cursor:pointer;font-weight:700;font-size:13px}.small-button.active{background:var(--teal);color:white;border-color:#264b4d}.action-button:hover,.small-button:hover{border-color:var(--wine)}
.landscape-stage{position:relative;isolation:isolate;aspect-ratio:16/8.8;min-height:340px;overflow:hidden;border:1px solid rgba(63,43,25,.38);background:linear-gradient(#afc4c9 0 45%,#a5a276 45% 100%);touch-action:none;user-select:none}.scene-image{position:absolute;inset:0;background-image:url("assets/landscape-background.webp");background-size:cover;background-position:center;z-index:0}.atmosphere-wash{position:absolute;left:0;right:0;pointer-events:none;z-index:2;transition:opacity .2s,backdrop-filter .2s}.atmosphere-wash.far{top:0;height:44%;background:rgba(194,213,218,.42);backdrop-filter:saturate(.72) contrast(.78) blur(.3px)}.atmosphere-wash.middle{top:38%;height:28%;background:linear-gradient(rgba(200,212,202,.22),transparent);backdrop-filter:saturate(.88)}
.zone{position:absolute;left:0;right:0;pointer-events:none;z-index:5;border-top:1px dashed rgba(255,250,235,.9);transition:opacity .2s}.zone span{position:absolute;left:10px;top:5px;background:rgba(55,25,30,.82);color:#fff8e8;font-size:12px;font-weight:700;padding:3px 7px;letter-spacing:.04em}.zone-background{top:0;height:39%;border-top:0}.zone-middle{top:39%;height:31%}.zone-foreground{top:70%;height:30%}.zone-divider{position:absolute;right:0;width:44px;height:30px;padding:0;transform:translateY(-15px);border:0;background:transparent;cursor:ns-resize;touch-action:none;z-index:8}.zone-divider span{position:absolute;right:8px;top:3px;width:26px;height:24px;display:grid;place-items:center;border:1px solid rgba(255,248,232,.9);border-radius:999px;background:rgba(55,25,30,.88);color:#fff8e8;font-size:16px;font-weight:700;box-shadow:0 2px 5px rgba(42,27,18,.25)}.zone-divider:hover span,.zone-divider:focus-visible span{background:var(--wine);border-color:var(--gold-light)}.zone-divider:focus-visible{outline:2px solid var(--gold-light);outline-offset:-2px}.zones-hidden .zone,.zones-hidden .zone-divider{opacity:0;pointer-events:none}
#objectLayer{position:absolute;inset:0;z-index:4}.scene-object{position:absolute;left:0;top:0;transform-origin:center bottom;cursor:grab;touch-action:none;filter:drop-shadow(0 4px 3px rgba(35,25,17,.26));transition:filter .15s}.scene-object:active{cursor:grabbing}.scene-object.selected{outline:2px solid var(--gold-light);outline-offset:5px}.scene-object .sprite{position:relative;width:100%;height:100%;background-image:var(--sprite-image);background-size:contain;background-position:center bottom;background-repeat:no-repeat}.scene-object .sprite:after{content:"";position:absolute;inset:0;background:#b8d8e2;opacity:var(--atmosphere-blue,0);pointer-events:none;-webkit-mask-image:var(--sprite-image);mask-image:var(--sprite-image);-webkit-mask-size:contain;mask-size:contain;-webkit-mask-position:center bottom;mask-position:center bottom;-webkit-mask-repeat:no-repeat;mask-repeat:no-repeat}.scene-object[data-type="tree"]{--sprite-image:url("assets/tree.webp")}.scene-object[data-type="pine"]{--sprite-image:url("assets/pine.webp")}.scene-object[data-type="house"]{--sprite-image:url("assets/house.webp")}.scene-object[data-type="rock"]{--sprite-image:url("assets/rock.webp")}.scene-object[data-type="fence"]{--sprite-image:url("assets/fence.webp")}.scene-object[data-type="hay"]{--sprite-image:url("assets/hay.webp")}.resize-handle{position:absolute;width:24px;height:24px;margin:-12px 0 0 -12px;border-radius:50%;border:2px solid #fff8e8;background:var(--gold);color:var(--wine-deep);box-shadow:0 2px 7px rgba(45,25,13,.45);display:grid;place-items:center;cursor:nwse-resize;touch-action:none;font-weight:900;font-size:15px;line-height:1;z-index:250}.resize-handle:hover{background:var(--gold-light);transform:scale(1.08)}
.selection-readout{position:absolute;right:10px;bottom:9px;z-index:7;background:rgba(248,243,232,.9);border:1px solid var(--line);padding:5px 9px;font-size:12px;color:var(--muted);pointer-events:none}.stage-caption{display:flex;justify-content:space-between;gap:12px;padding-top:8px;color:var(--muted);font-size:12px}.depth-key{display:flex;align-items:center;gap:6px}.depth-key span{width:24px;height:6px;display:inline-block}.key-near{background:#a75d38}.key-far{background:#759ca9}
.control-card{padding:17px;min-height:100%}.control-section{display:none}.control-section.active-panel{display:block}.section-label{font:700 12px "Cinzel",serif;letter-spacing:.15em;text-transform:uppercase;color:var(--wine);margin:0 0 10px;border-bottom:1px solid var(--line);padding-bottom:8px}.control-intro{color:var(--muted);font-size:15px;line-height:1.45;margin:0 0 14px}.cue-list{display:grid;gap:6px}.cue-button{width:100%;border:1px solid transparent;border-bottom-color:var(--line);background:transparent;color:var(--ink);padding:8px 7px;text-align:left;cursor:pointer;display:grid;grid-template-columns:25px 1fr;gap:7px;align-items:start}.cue-button span{color:var(--wine);font:700 13px "Cinzel",serif}.cue-button strong{display:block;font:700 14px "Libre Baskerville",serif}.cue-button small{display:block;color:var(--muted);font-size:12px;margin-top:2px}.cue-button.active{background:#efe4cd;border-color:#c8aa70}.professor-note{display:flex;gap:10px;background:var(--wine-deep);color:#f5ead5;padding:12px;margin-top:14px}.professor-note p{font:italic 12px/1.45 "Libre Baskerville",serif;margin:0}.professor-note strong{display:block;color:var(--gold-light);font-style:normal;margin-bottom:3px}.professor-seal{width:33px;height:33px;border-radius:50%;border:1px solid var(--gold);display:grid;place-items:center;color:var(--gold-light);font:700 11px "Cinzel",serif;flex:0 0 auto}
.object-palette{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:14px}.object-choice{border:1px solid var(--line);background:#f0e6d1;padding:8px 4px;cursor:pointer;color:var(--ink);font-weight:700;font-size:12px}.object-choice .mini-sprite{display:block;width:52px;height:55px;margin:0 auto 4px;background-size:contain;background-position:center bottom;background-repeat:no-repeat}.object-choice[data-type="tree"] .mini-sprite{background-image:url("assets/tree.webp")}.object-choice[data-type="pine"] .mini-sprite{background-image:url("assets/pine.webp")}.object-choice[data-type="house"] .mini-sprite{background-image:url("assets/house.webp")}.object-choice[data-type="rock"] .mini-sprite{background-image:url("assets/rock.webp")}.object-choice[data-type="fence"] .mini-sprite{background-image:url("assets/fence.webp")}.object-choice[data-type="hay"] .mini-sprite{background-image:url("assets/hay.webp")}.selected-controls{border-top:1px solid var(--line);padding-top:12px}.selected-controls.disabled{opacity:.48;pointer-events:none}.selected-heading{display:flex;justify-content:space-between;font-size:13px;color:var(--muted);margin-bottom:9px}.selected-heading strong{color:var(--wine)}.selected-controls label,.slider-stack label{display:grid;gap:5px;font-weight:700;font-size:13px;margin-bottom:11px}.selected-controls label>output{justify-self:end;margin-top:-22px;color:var(--muted)}input[type="range"]{width:100%;accent-color:var(--wine)}.danger{color:#7b2828}.instruction-box{background:#ece2cb;border-left:4px solid var(--gold);padding:10px 11px;color:var(--muted);font-size:13px;line-height:1.4;margin-top:13px}.instruction-box strong{color:var(--wine-deep)}
.slider-stack{display:grid;gap:4px}.slider-stack label span{display:flex;justify-content:space-between}.slider-stack output{color:var(--muted)}.compare-row{margin:4px 0 12px}.control-section h3{font:700 19px "Libre Baskerville",serif;color:var(--wine-deep);margin:0 0 6px}.challenge-list{list-style:none;padding:0;margin:10px 0 14px;display:grid;gap:7px}.challenge-list li{display:grid;grid-template-columns:20px 1fr;gap:8px;align-items:start;color:var(--muted);font-size:14px}.challenge-list li span{width:18px;height:18px;border:1px solid #9a8664;border-radius:50%;margin-top:1px}.challenge-list li.pass{color:#285a45}.challenge-list li.pass span{background:#2f7457;border-color:#2f7457;position:relative}.challenge-list li.pass span:after{content:"✓";color:white;position:absolute;inset:-2px 0 0;text-align:center;font-weight:700}.primary-button{width:100%;border:1px solid var(--wine-deep);background:var(--wine);color:white;padding:10px 14px;cursor:pointer;font-weight:700}.feedback{min-height:55px;margin:10px 0;background:#efe5d2;border:1px solid var(--line);padding:10px;font-size:13px;line-height:1.4;color:var(--muted)}.full-width{width:100%}.toast{position:fixed;left:50%;bottom:20px;transform:translate(-50%,20px);background:var(--wine-deep);color:white;padding:10px 16px;opacity:0;pointer-events:none;transition:.2s;z-index:50}.toast.show{opacity:1;transform:translate(-50%,0)}
@media(max-width:860px){.workspace-grid{grid-template-columns:1fr}.control-card{min-height:0}.landscape-stage{min-height:300px}.cue-list{grid-template-columns:repeat(2,1fr)}.professor-note{grid-column:1/-1}.motto{display:none}}
@media(max-width:640px){.studio-bar{padding:11px 14px}.brand-mark{width:38px;height:38px}.brand-line{font-size:9px;letter-spacing:.11em}h1{font-size:17px;white-space:normal}.open-full{font-size:12px;padding:6px 8px}.app-shell{padding:9px}.mode-tabs{gap:4px;overflow-x:auto}.mode-tab{padding:7px 10px;font-size:13px;flex:0 0 auto}.lesson-strip{grid-template-columns:42px 1fr;padding:9px}.lesson-number{font-size:21px}.lesson-controls{grid-column:1/-1;justify-content:flex-end}.lesson-copy>p:last-child{font-size:13px}.stage-toolbar{align-items:flex-start}.stage-toolbar>div:first-child{display:block}.stage-toolbar span{display:block;margin-top:2px}.landscape-stage{min-height:260px;aspect-ratio:4/3}.stage-caption{display:none}.cue-list{grid-template-columns:1fr}.object-palette{grid-template-columns:repeat(3,1fr)}.selection-readout{max-width:70%}}
@media(max-height:720px) and (min-width:861px){.studio-bar{min-height:64px;padding-block:8px}.brand-mark{width:39px;height:39px}.brand-line{font-size:11px}h1{font-size:22px}.app-shell{padding-top:9px}.mode-tabs{margin-bottom:7px}.mode-tab{padding-block:5px}.lesson-strip{padding-block:7px;margin-bottom:8px}.lesson-copy>p:last-child{display:none}.landscape-stage{min-height:300px;max-height:52vh}.control-card{padding:13px}.cue-button{padding-block:5px}.professor-note{margin-top:8px}.object-choice{padding-block:4px}.object-choice .mini-sprite{height:42px}.control-intro{font-size:13px;margin-bottom:8px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}