@import url('https://fonts.googleapis.com/css2?family=Mitr:wght@400;500;600;700&family=Noto+Sans+Thai:wght@400;600;700;800&display=swap');
:root{--ink:#173d55;--navy:#113047;--orange:#ff8a3d;--yellow:#ffd74a;--mint:#4bd6b0;--blue:#42bce8;--cream:#fff9e9;--shadow:#0d2c3d33}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:'Noto Sans Thai',sans-serif;color:var(--ink)}button,input{font:inherit}button{cursor:pointer}
body{background:#f6c789 url('assets/market-background.png') center/cover fixed no-repeat;overflow:hidden}
body:before{content:"";position:fixed;inset:0;background:linear-gradient(90deg,#fff2 0 62%,#15384c30),linear-gradient(#fff4,#ff9d3425);pointer-events:none}
.app{position:relative;z-index:1;width:100vw;height:100dvh;display:grid;grid-template-rows:auto 1fr;padding:clamp(8px,1vw,18px);gap:10px}
.topbar{height:clamp(58px,7vh,82px);display:flex;align-items:center;justify-content:space-between;padding:8px 14px 8px 18px;background:#fffdf2e8;border:3px solid #fff;border-radius:24px;box-shadow:0 8px 0 #d5672a,0 12px 24px var(--shadow);backdrop-filter:blur(8px)}
.brand{display:flex;align-items:center;gap:12px}.brand-icon{display:grid;place-items:center;width:48px;height:48px;background:var(--yellow);border-radius:15px;border:3px solid #fff;box-shadow:0 4px 0 #e59a22;font-size:25px}.brand small,.panel-heading small,.shelf-head small{font-weight:700;color:#e36b32}.brand h1,.panel-heading h2,.shelf-head h2{font-family:Mitr,sans-serif;margin:-3px 0 0;line-height:1;font-size:clamp(20px,2.1vw,32px)}
.top-actions{display:flex;gap:8px}.icon-btn{width:46px;height:46px;border:2px solid #dceaf0;background:#fff;border-radius:14px;color:var(--navy);font-size:22px;box-shadow:0 4px 0 #bfd3dc}
.workspace{min-height:0;display:grid;grid-template-columns:minmax(520px,1.5fr) minmax(420px,.9fr);gap:12px}
.scale-zone,.teacher-panel{position:relative;min-height:0;border:4px solid #fff;border-radius:30px;box-shadow:0 10px 0 #c85f2c,0 20px 35px #173d5540;overflow:hidden}
.scale-zone{display:flex;flex-direction:column;align-items:center;justify-content:flex-end;padding:50px 20px 10px;background:radial-gradient(circle at 50% 35%,#fff7 0 25%,transparent 55%)}
.lesson-strip{position:absolute;top:12px;left:50%;transform:translateX(-50%);display:flex;gap:18px;align-items:center;white-space:nowrap;background:#fff8e7;border:3px solid #ffc839;border-radius:999px;padding:7px 18px;box-shadow:0 5px 0 #d87b2e;font-size:clamp(13px,1.25vw,19px)}.lesson-strip strong{color:#e64f38}
.pan{position:relative;z-index:3;width:min(65%,570px);height:clamp(74px,11vh,120px);display:flex;align-items:center;justify-content:center;background:linear-gradient(#eefcff,#7fbdcb);border:7px solid #f6ffff;border-top-width:11px;border-radius:18% 18% 48% 48%/30% 30% 70% 70%;box-shadow:inset 0 -15px 18px #39758455,0 8px 0 #315b67,0 15px 22px #173d5540;transition:.2s}.pan.dragover{transform:translateY(-4px);filter:drop-shadow(0 0 14px #fff)}.pan-items{display:flex;align-items:flex-end;justify-content:center;gap:4px;max-width:92%;height:80%;overflow:hidden}.pan #panHint{font-weight:800;color:#397080}.pan.has-items #panHint{display:none}.pan-neck{height:24px;width:34%;background:linear-gradient(90deg,#8ca1a4,#fff,#718b91);border-inline:5px solid #45606a;z-index:2}
.dial{position:relative;width:min(59vh,510px,75%);aspect-ratio:1;background:radial-gradient(circle,#fffef5 0 67%,#dce9e8 68% 73%,#607d83 74% 78%,#ffb54d 79% 84%,#915126 85%);border-radius:50%;box-shadow:inset 0 0 0 8px #fff8,0 12px 0 #6f3e25,0 20px 26px #173d5555;touch-action:none;user-select:none}.dial svg{position:absolute;inset:4%;width:92%;height:92%;overflow:visible}.dial-title{position:absolute;top:24%;left:50%;transform:translateX(-50%);font-family:Mitr,sans-serif;font-weight:700;font-size:clamp(16px,2vh,23px);text-align:center;color:#315b67}.dial-title small{display:block;font:700 11px 'Noto Sans Thai';color:#df6937}.needle{position:absolute;inset:0;pointer-events:none;transform:rotate(-150deg);filter:drop-shadow(2px 3px 2px #0005)}.needle span{position:absolute;left:calc(50% - 5px);top:18%;width:10px;height:34%;border-radius:8px 8px 2px 2px;background:linear-gradient(90deg,#9e2432,#f1544e,#7d182a);clip-path:polygon(50% 0,100% 100%,0 100%)}.hub{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:12%;aspect-ratio:1;border-radius:50%;background:radial-gradient(circle at 35% 30%,#ffe5a8,#e14c37 40%,#7c1b27 72%);border:4px solid #fff1b1;box-shadow:0 4px 7px #0004}.readout{position:absolute;left:50%;bottom:23%;transform:translateX(-50%);min-width:105px;padding:4px 12px;background:#153d4b;color:#bfffea;border:3px solid #72d9cb;border-radius:12px;text-align:center;font:700 clamp(17px,2.1vh,24px) Mitr;box-shadow:inset 0 0 12px #0006}.scale-base{height:40px;width:min(70%,590px);display:grid;place-items:center;background:linear-gradient(#ffb350,#d5682b);border:4px solid #ffe6ad;border-radius:10px 10px 24px 24px;box-shadow:0 8px 0 #824322;color:#fff;font:700 12px Mitr;letter-spacing:2px}
.teacher-panel{padding:clamp(12px,1.4vw,24px);background:#fffaf0ef;backdrop-filter:blur(10px);overflow:auto}.panel-heading,.shelf-head{display:flex;align-items:center;justify-content:space-between;gap:10px}.panel-heading #modeBadge{padding:6px 11px;border-radius:999px;background:#e9fff6;color:#178569;font-weight:800;font-size:13px}.mode-switch{margin:16px 0 12px;padding:5px;display:grid;grid-template-columns:1fr 1fr;background:#dbe9ed;border-radius:16px}.mode{border:0;padding:10px;border-radius:12px;background:transparent;color:#526e7b;font-weight:800}.mode.active{background:#fff;color:#173d55;box-shadow:0 3px 8px #173d5530}.needle-control{background:#fff;border:2px solid #d7ebed;border-radius:20px;padding:12px 15px;box-shadow:0 5px 0 #bad6d9}.needle-control p{margin:0;text-align:center;font-weight:800}.stepper{display:grid;grid-template-columns:46px 1fr 46px;align-items:center;gap:9px;margin:8px 0}.stepper button{height:42px;border:0;border-radius:12px;background:var(--orange);color:#fff;font-size:27px;font-weight:800;box-shadow:0 4px 0 #bf4e28}.stepper output{text-align:center;font:700 27px Mitr;color:#173d55}.needle-control input{width:100%;accent-color:#ff754a}.range-label{display:flex;justify-content:space-between;font-size:12px;font-weight:700;color:#567481}.reveal-row{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:7px;margin:13px 0}.reveal-row button{min-height:44px;border:0;border-radius:13px;background:#dcebed;color:#234d5f;font-weight:800;box-shadow:0 4px 0 #9ebec4}.reveal-row .primary{background:var(--mint);color:#0b4f42;box-shadow:0 4px 0 #159277}.shelf-head{border-top:2px dashed #efb78a;padding-top:13px}.shelf-head span{font-size:12px;color:#6c7f84}.item-shelf{display:grid;grid-template-columns:repeat(4,minmax(76px,1fr));gap:8px;margin-top:10px}.item-card{position:relative;min-height:106px;padding:6px 4px;border:2px solid #fff;background:linear-gradient(#fff,#fff4d8);border-radius:17px;box-shadow:0 5px 0 #e2a765,0 8px 12px #173d5520;text-align:center;color:#234d5f;touch-action:none}.item-card:hover{transform:translateY(-2px)}.item-art{height:55px;display:grid;place-items:center}.item-art svg{width:58px;height:58px;filter:drop-shadow(0 4px 2px #6f4d2630)}.item-card strong{display:block;font-size:13px;line-height:1.1}.item-card small{font-weight:700;color:#e35d32}.pan-item{position:relative;width:54px;flex:0 1 54px;animation:drop .35s cubic-bezier(.2,1.4,.5,1)}.pan-item svg{display:block;width:100%;height:auto}.pan-item button{position:absolute;right:-2px;top:-6px;width:21px;height:21px;padding:0;border:0;border-radius:50%;background:#e94b4b;color:#fff;font-weight:800;font-size:12px}.toast{position:fixed;z-index:10;left:50%;bottom:22px;transform:translate(-50%,20px);padding:10px 18px;background:#173d55;color:#fff;border:3px solid #fff;border-radius:15px;font-weight:800;opacity:0;pointer-events:none;transition:.25s}.toast.show{opacity:1;transform:translate(-50%,0)}
@keyframes drop{from{transform:translateY(-40px) scale(.6);opacity:0}to{transform:none;opacity:1}}
@media(max-aspect-ratio:4/3){body{overflow:auto}.app{height:auto;min-height:100dvh}.workspace{grid-template-columns:1fr}.scale-zone{min-height:720px}.teacher-panel{overflow:visible}.item-shelf{grid-template-columns:repeat(4,1fr)}}
@media(max-height:750px) and (min-aspect-ratio:4/3){.topbar{height:54px}.workspace{grid-template-columns:minmax(480px,1.35fr) minmax(390px,.85fr)}.scale-zone{padding-top:44px}.dial{width:min(52vh,430px,70%)}.pan{height:72px}.teacher-panel{padding:10px 14px}.mode-switch{margin:8px 0}.needle-control{padding:7px 12px}.reveal-row{margin:8px 0}.item-card{min-height:86px}.item-art{height:42px}.item-art svg{width:45px;height:45px}}
@media(max-width:760px){.app{padding:6px}.brand small{display:none}.workspace{grid-template-columns:1fr}.scale-zone{min-height:650px}.lesson-strip{font-size:12px;gap:7px}.teacher-panel{border-radius:24px}.item-shelf{grid-template-columns:repeat(3,1fr)}}

/* Revision: intro, clearer typography, large objects and collapsible teacher tools */
.brand>div,.panel-heading>div,.shelf-head>div{display:flex;flex-direction:column;justify-content:center;gap:1px}.brand small,.panel-heading small,.shelf-head small{display:block;line-height:1.25}.brand h1,.panel-heading h2,.shelf-head h2{margin:0;line-height:1.2}
.readout{bottom:20%;min-width:150px;font-size:clamp(13px,1.65vh,19px)}.readout[hidden],.advanced-controls[hidden]{display:none}
.always-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:14px 0}.always-actions button,.utility-row button{min-height:46px;border:0;border-radius:13px;background:#dcebed;color:#234d5f;font-weight:800;box-shadow:0 4px 0 #9ebec4}.always-actions .primary{background:var(--mint);color:#0b4f42;box-shadow:0 4px 0 #159277}.advanced-controls{padding-bottom:10px;border-bottom:2px dashed #efb78a}.utility-row{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:10px}.shelf-head{border-top:0;padding-top:10px}
.item-card{min-height:112px}.item-art{height:58px}.item-art svg{width:62px;height:62px}.item-card strong{line-height:1.15}.pan-items{gap:8px;max-width:96%;height:96%}.pan-item{width:clamp(76px,7vw,118px);flex:0 1 clamp(76px,7vw,118px)}.pan-item button{right:0;top:-3px;width:26px;height:26px;font-size:14px}
.intro{position:fixed;z-index:100;inset:0;display:grid;place-items:center;padding:20px;background:linear-gradient(#163d5690,#b8582780),url('assets/market-background.png') center/cover}.intro.hidden{display:none}.intro-card{width:min(720px,92vw);padding:clamp(28px,5vw,58px);text-align:center;background:#fffaf0f2;border:5px solid #fff;border-radius:38px;box-shadow:0 13px 0 #c9612b,0 30px 60px #173d5570}.intro-scale{margin:auto;width:92px;height:92px;display:grid;place-items:center;border-radius:28px;background:linear-gradient(135deg,#ffd94e,#ff8b3e);border:5px solid #fff;box-shadow:0 7px 0 #d5692e;font-size:50px}.intro .eyebrow{margin:24px 0 0;color:#e45d31;font-weight:800}.intro h1{margin:0;font:700 clamp(45px,7vw,78px) Mitr;line-height:1.15;color:#173d55;text-shadow:0 4px #fff}.intro p{font-size:clamp(18px,2vw,25px);line-height:1.65}.intro p strong{color:#e64f38}.intro-tips{display:flex;justify-content:center;flex-wrap:wrap;gap:9px;margin:20px 0}.intro-tips span{padding:8px 13px;border-radius:999px;background:#e3f9f4;color:#19735f;font-weight:800}.intro #startBtn{min-width:260px;padding:15px 28px;border:3px solid #fff;border-radius:18px;background:#ff9144;color:#fff;font:700 25px Mitr;box-shadow:0 7px 0 #bd4e29,0 12px 22px #173d5535}
@media(max-height:750px) and (min-aspect-ratio:4/3){.always-actions{margin:8px 0}.item-card{min-height:96px}.item-art{height:48px}.item-art svg{width:50px;height:50px}.pan-item{width:76px;flex-basis:76px}.intro-card{padding:22px 38px}.intro-scale{width:72px;height:72px;font-size:38px}.intro .eyebrow{margin-top:12px}.intro p{margin:8px 0}.intro-tips{margin:10px 0}.intro #startBtn{padding:10px 22px}}

/* Fine alignment pass */
.panel-heading>div,.shelf-head>div{gap:6px}.panel-heading small,.shelf-head small{margin:0;line-height:1.1}.panel-heading h2,.shelf-head h2{line-height:1.15}
.pan-items{position:relative;z-index:8;overflow:visible;align-items:flex-end}.pan-item{position:relative;z-index:9;transform:translateY(-4px)}.pan-item button{z-index:10}
.readout{bottom:26%}