@import url('https://fonts.googleapis.com/css2?family=Prompt:wght@400;500;600;700&display=swap');
:root{font-family:Prompt,sans-serif;color:#172b48;background:#f3f6fa;line-height:1.7}*{box-sizing:border-box}body{margin:0}header{background:white;border-bottom:1px solid #dce4ee;padding:16px 5%;display:flex;align-items:center;gap:22px;flex-wrap:wrap}a{color:#155ab9}button,.button{font:inherit;background:#145ac1;color:white;border:0;border-radius:10px;padding:11px 19px;cursor:pointer;text-decoration:none;display:inline-block}button.secondary{background:#e5edf8;color:#174373}button:disabled{opacity:.45;cursor:default}main{max-width:1180px;margin:auto;padding:32px 24px}h1{font-size:clamp(28px,4vw,48px);line-height:1.3}h2{line-height:1.4}.hero{background:#102d55;color:white;padding:40px;border-radius:24px;display:grid;grid-template-columns:1.4fr 1fr;gap:32px;align-items:center}.hero small{color:#9bc9ff}.hero p{color:#d3e1f4}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin:24px 0}.card,.panel{background:white;border:1px solid #dce4ee;border-radius:18px;padding:24px}.card img{width:100%;height:150px;object-fit:contain;background:#edf4fc;border-radius:12px}.card h2{font-size:19px}.muted{color:#5a6e87}.tag{display:inline-block;background:#eaf2ff;color:#245aa2;border-radius:20px;padding:3px 12px;font-size:13px}.notice{background:#fff4dc;color:#745116;padding:16px;border-radius:12px;margin:18px 0}.filters{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap}input,select,textarea{font:inherit;border:1px solid #bac9dc;border-radius:8px;padding:10px;background:white;max-width:100%}textarea{width:100%;min-height:110px}label{display:block;margin:18px 0 8px}pre{white-space:pre-wrap;font:inherit}.flow{display:flex;gap:12px;align-items:center;justify-content:center;flex-wrap:wrap}.flow span{padding:20px;background:#e9f3ff;border-radius:12px;color:#14509c}.steps{border-left:3px solid #3681df;padding-left:24px}.steps p{padding:8px 0}.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}table{border-collapse:collapse;width:100%;font-size:14px}th,td{padding:10px;text-align:left;border-bottom:1px solid #dce4ee}footer{padding:30px;text-align:center;color:#5a6e87}.slide{min-height:75vh;background:white;border-radius:24px;padding:6%;display:flex;flex-direction:column;justify-content:center}.slide h1{font-size:clamp(32px,5vw,64px)}.slide p,.slide li{font-size:clamp(20px,2.3vw,30px)}.slide.cover{background:#102d55;color:white}.slide.cover .flow span{background:#214678;color:white}.slide small{font-size:16px}.slide img{max-height:260px}.hidden{display:none!important}@media(max-width:800px){.grid{grid-template-columns:repeat(2,1fr)}.hero{grid-template-columns:1fr;padding:26px}}@media(max-width:550px){.grid{grid-template-columns:1fr}main{padding:20px 16px}header{gap:12px}.panel{padding:18px}}@media print{header,button,.filters,footer{display:none}.panel,.slide{border:0;break-inside:avoid}body{background:white}}

/* Illustrated teaching layouts */
.slide-columns{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center}.slide-columns figure{margin:0}.scene{width:100%;aspect-ratio:3/2;background-image:url('illustrations.png');background-size:200% 200%;background-repeat:no-repeat;border-radius:18px;background-color:#eaf3ff}.scene.door{background-position:left top}.scene.board{background-position:right top}.scene.counter{background-position:left bottom}.scene.safety{background-position:right bottom}figcaption{font-size:13px!important;color:#56718c;margin-top:8px}.cover figcaption{color:#d7e7fc}.lesson-figure{max-width:650px;margin:24px auto}.reading h2{margin-top:32px}.reading p{max-width:88ch}.table-wrap{overflow-x:auto}.slide{padding:4%;min-height:76vh}.slide-columns p,.slide-columns li{font-size:clamp(18px,1.8vw,26px)}.slide-columns .flow span{padding:12px;font-size:20px}.slide h1{font-size:clamp(30px,4.2vw,56px)}@media(max-width:800px){.slide-columns{grid-template-columns:1fr}.slide-columns figure{max-width:600px}.slide{min-height:70vh}}

.cover-art{width:100%;aspect-ratio:1;background-image:url('lesson-covers.png');background-size:300% 300%;background-repeat:no-repeat;border-radius:16px;background-color:#eaf3ff}.cover-1{background-position:0% 0%}.cover-2{background-position:50% 0%}.cover-3{background-position:100% 0%}.cover-4{background-position:0% 50%}.cover-5{background-position:50% 50%}.cover-6{background-position:100% 50%}.cover-7{background-position:0% 100%}.cover-8{background-position:50% 100%}.cover-9{background-position:100% 100%}.lesson-cover{max-width:460px;margin:24px auto}.card .cover-art{aspect-ratio:1}.code{font-family:Consolas,monospace;background:#102a47;color:#e7f2ff;padding:22px;border-radius:12px;font-size:15px;line-height:1.65;overflow:auto;white-space:pre}.slide .code{font-size:clamp(16px,1.7vw,24px)}.print-sheet{break-after:page}@media print{.print-sheet:last-child{break-after:auto}}

.attachment-gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:18px;margin:20px 0}.attachment-card{margin:0;padding:16px;border:1px solid #dce4ee;border-radius:12px;background:#f7faff}.attachment-card img{display:block;width:100%;height:220px;object-fit:contain;margin:12px 0;background:white}.attachment-card input{width:100%}.attachment-card button{margin-top:12px}.upload-panel{padding:18px;background:#edf4ff;border-radius:12px;margin:20px 0}

.wiring-panel{margin:24px 0}.wiring-figure{margin:22px 0}.wiring-figure img{display:block;width:100%;height:auto;max-height:none}.wiring-slide h1{font-size:clamp(28px,3vw,42px);margin:10px 0}.wiring-slide .wiring-figure{margin:8px 0}.wiring-slide img{max-height:62vh;object-fit:contain}
.teacher-only{display:none}body.teacher-mode .teacher-only{display:revert}
.lesson-toc{position:sticky;top:0;z-index:5;display:flex;gap:8px;overflow-x:auto;background:#f3f6fa;padding:10px 0;margin:8px 0;border-bottom:1px solid #dce4ee}
.lesson-toc a{white-space:nowrap;background:#eaf2ff;color:#245aa2;border-radius:20px;padding:4px 14px;text-decoration:none;font-size:14px}
.lesson-toc a:focus-visible,.lesson-toc a:hover{background:#145ac1;color:white}
main details>summary{cursor:pointer;font-size:1.3em;font-weight:600;line-height:1.4;padding:4px 0}
abbr[title]{text-decoration:underline dotted;cursor:help}
html{scroll-behavior:smooth}[id]{scroll-margin-top:64px}
/* ===== ระบบห้องเรียนสด / คิวตรวจงาน / จัดกลุ่ม / log (4 พ.ย. 2569) ===== */
main.wide{max-width:1500px}
.notice:empty{display:none}.notice.ok{background:#e3f6ea;color:#1e6b3d}
.tnav{display:flex;flex-wrap:wrap;gap:8px;padding:10px 5%;background:#102d55}
.tnav a{color:#dbe8ff;text-decoration:none;padding:7px 14px;border-radius:999px;font-size:15px}
.tnav a[aria-current=page]{background:#e2f86a;color:#14213d;font-weight:600}
.tnav a:hover{background:#21477f}.tnav .help-badge{background:#c0392b;color:#fff;margin-left:auto}
button.warn{background:#c2581c}button.small{padding:4px 10px;font-size:13px}
.wall-bar{display:flex;flex-wrap:wrap;align-items:center;gap:12px}.wall-bar h1{margin:0 12px 0 0}
#wall{display:block;width:100%;height:auto;background:#202f48;border-radius:14px;margin:12px 0}
.wall-page:fullscreen{background:#202f48;padding:12px;overflow:auto;color:#e8f0ff}.wall-page:fullscreen .muted{color:#b9c8e6}.wall-page:fullscreen .panel,.wall-page:fullscreen .help-item{color:#172b48}
.wall-legend{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 10px;font-size:14px}.wall-legend span{padding:4px 12px;border-radius:999px;color:#fff}
.wall-legend .lv0{background:#3d5870}.wall-legend .lv1{background:#9a7b10}.wall-legend .lv2{background:#b8591c}.wall-legend .lv3{background:#a63040}
.wall-open{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 12px}
.wall-cols{display:grid;grid-template-columns:1fr 1fr;gap:20px}.wall-cols h2{font-size:18px}
.wall-log{list-style:none;padding:0;margin:0;display:grid;gap:4px;font-size:15px}
.help-item{background:#fff;border:1px solid #f0c4bd;border-left:5px solid #d9534f;border-radius:12px;padding:10px 14px;margin:0 0 10px}
.help-item.answered,.help-item.closed{border-left-color:#3aa067;border-color:#cfe8d8}.help-item input{flex:1;min-width:180px}
.help-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:14px;margin-top:16px}
.tabs{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 4px}
.review{display:grid;grid-template-columns:minmax(260px,340px) 1fr;gap:20px;margin-top:16px;align-items:start}
.queue{list-style:none;padding:0;margin:0;display:grid;gap:6px;max-height:80vh;overflow:auto}
.queue button{width:100%;text-align:left;background:#fff;color:#172b48;border:1px solid #dce4ee;display:grid;gap:2px;padding:10px 14px}
.queue button.active{border:2px solid #145ac1;background:#eef5ff}.queue small{color:#5a6e87}.queue em{color:#b8591c;font-style:normal}
.answer{border-left:3px solid #9bc0ec;padding:2px 0 2px 14px;margin:12px 0}.answer p{margin:4px 0;white-space:pre-wrap}
.attachment-gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px;margin:12px 0}
.attachment-gallery img{width:100%;height:180px;object-fit:contain;background:#f3f6fa;border-radius:8px}
.crit{margin:14px 0}.crit label{margin:0 0 6px;font-weight:600}.levels{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:6px;margin-bottom:6px}
.lvl{background:#f1f5fb;color:#172b48;border:1px solid #cfdbea;text-align:left;padding:8px 10px;font-weight:700}.lvl small{display:block;font-weight:400;font-size:12px;line-height:1.4}
.lvl.on{background:#145ac1;color:#fff;border-color:#145ac1}
.board{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px;margin:16px 0}
.gcard{border:1px solid #dce4ee;border-radius:14px;padding:12px;background:#fbfcfe}.gcard.new{border-style:dashed;border-color:#145ac1}.gcard.bad{border-color:#d9534f}.gcard.none{background:#fff8e6}
.gcard header{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin-bottom:8px}.gcard header input{flex:1;min-width:120px;font-weight:600}
.mrow{display:flex;justify-content:space-between;align-items:center;gap:6px;padding:4px 0;border-bottom:1px dashed #e3e9f1;font-size:14px}.mrow select{max-width:130px;padding:4px;font-size:13px}.mrow.moved{background:#fff4cc}
.warn-text{color:#b23b2e;font-size:13px;margin:6px 0 0}
.savebar{position:sticky;bottom:0;background:#fff;border-top:2px solid #dce4ee;padding:12px;display:flex;flex-wrap:wrap;gap:10px;align-items:center}
table.log td{vertical-align:top}table.log tr.k-submit td,table.log tr.k-resubmit td{background:#f0f7ff}table.log tr.k-approve td{background:#eefaf2}table.log tr.k-return td{background:#fff3e8}table.log tr.k-help_ask td{background:#fdeeee}
.returned-note{background:#fff0e0;color:#7a3d0c;border-left:5px solid #e07a2b;padding:12px 16px;border-radius:10px;margin:10px 0}
.help-box{margin-top:24px}.help-box .answered{color:#1e6b3d}
@media (max-width:900px){.review,.wall-cols{grid-template-columns:1fr}}
.crit input{width:130px}
#accQ{min-width:300px}
details.panel{margin-top:24px}details.panel>summary{cursor:pointer}details.panel>summary h2{display:inline;font-size:1.25em}