.teaching-stage{--ink:#191b32;--paper:#faf7ed;--accent:#6541ce;--wash:#ebe5ff;--hot:#d94254;font-family:"Microsoft JhengHei","PingFang TC",system-ui,sans-serif;color:var(--ink);background:var(--paper);box-sizing:border-box}
.teaching-stage[data-theme="2"]{--accent:#076e70;--wash:#d9f2ea;--hot:#b54824}
.teaching-stage[data-theme="3"]{--accent:#ab3527;--wash:#ffe1cd;--hot:#862ac3}
.teaching-stage[data-theme="4"]{--accent:#224d91;--wash:#e1ebff;--hot:#9c3f68}
.presenter-mode .lesson-view.teaching-stage,.standalone-stage .teaching-stage{display:grid;grid-template-rows:auto minmax(0,1fr) auto;width:100%;height:100dvh;min-height:0;padding:0;border:0;border-radius:0;max-width:none;background:var(--paper);color:var(--ink);overflow:hidden;box-shadow:none}
.teaching-toolbar{display:flex;gap:12px;align-items:center;padding:12px 24px;border-bottom:1px solid #c7c4ce;background:white;min-width:0}
.teaching-toolbar label{min-width:0;max-width:50%}.teaching-toolbar select{max-width:100%;height:38px;border:1px solid #b5afbf;border-radius:5px;background:white;font:inherit;font-size:15px;color:#25243a;padding:4px 8px}
.stage-session{margin-left:auto;color:var(--accent);font-weight:800;white-space:nowrap}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
.teaching-canvas{min-height:0;overflow:hidden;display:flex;container-type:size}
.teaching-slide{width:100%;box-sizing:border-box;display:flex;flex-direction:column;justify-content:center;padding:clamp(20px,4vw,64px) clamp(24px,6vw,90px);gap:20px;overflow:hidden;position:relative}
.teaching-slide h1{font-size:clamp(28px,4.1vw,58px);line-height:1.2;margin:0;max-width:1100px;letter-spacing:-.025em;color:inherit}
.teaching-slide p{font-size:clamp(20px,2.05vw,30px);line-height:1.6;margin:0;white-space:pre-wrap;overflow-wrap:anywhere;max-width:1120px;color:inherit}
.teaching-slide .slide-footnote{font-size:clamp(17px,1.6vw,23px);opacity:.85}
.layout-question{background:var(--accent);color:white;padding-right:15vw}
.layout-question h1{font-size:clamp(34px,5.2vw,76px);line-height:1.2}
.layout-question p{max-width:920px}.slide-number{font-size:clamp(36px,4vw,58px);font-weight:300;color:#ffffffb0;line-height:1}
.slide-kicker{color:var(--accent);font-weight:800;font-size:clamp(16px,1.5vw,22px)}
.layout-source{background:var(--wash)}.slide-sources{list-style:none;padding:0;margin:0;display:grid;gap:14px}
.slide-sources li{font-size:clamp(18px,2vw,28px);border-bottom:2px solid var(--accent);padding:10px 0;line-height:1.4;overflow-wrap:anywhere}
.slide-compare{display:grid;grid-template-columns:1fr 1fr;gap:40px;margin-top:12px}
.slide-compare section{padding:14px 0;border-top:8px solid var(--hot)}.slide-compare section+section{border-color:var(--accent)}
.slide-compare h2{font-size:clamp(23px,2.4vw,36px);line-height:1.3;margin:0 0 24px}.slide-compare p{font-size:clamp(22px,2.4vw,34px)}
.slide-steps{padding:0 0 0 1.7em;margin:8px 0;display:grid;gap:22px}
.slide-steps li{font-size:clamp(20px,2.1vw,30px);line-height:1.55;padding-left:10px;overflow-wrap:anywhere}.slide-steps li::marker{color:var(--accent);font-weight:900}
.slide-flow{list-style:none;display:grid;grid-template-columns:repeat(var(--flow-count,5),1fr);padding:0;margin:32px 0;gap:12px;counter-reset:node}
.slide-flow li{font-size:clamp(19px,2vw,28px);line-height:1.4;padding-top:16px;border-top:5px solid var(--accent);counter-increment:node}
.slide-flow li::before{content:counter(node,decimal-leading-zero);display:block;color:var(--accent);font-size:36px;margin-bottom:18px}
.layout-prompt{background:#172139;color:#fff}.layout-prompt .slide-prompt{font-family:inherit;border-left:7px solid #f7c66c;padding-left:28px;max-width:1040px}
.layout-exercise{background:var(--wash)}.slide-challenge summary{font-size:clamp(17px,1.5vw,23px);cursor:pointer;color:var(--accent);font-weight:700}.slide-challenge p{font-size:clamp(17px,1.5vw,23px);margin-top:12px}
.layout-disaster{background:#ffd669}.layout-disaster .slide-kicker{color:#7e241e}.layout-reveal{background:#edf5ec}
.teaching-slide .answer-cover{padding:24px;background:transparent;border:2px dashed #507b52;border-radius:0;font-size:clamp(22px,2.5vw,36px);color:#235528;text-align:left;max-width:900px}
.layout-exit h1{color:var(--accent)}.layout-exit p:first-of-type{font-size:clamp(24px,3vw,42px)}.layout-break{text-align:center;align-items:center;background:var(--wash)}.break-number{font-size:clamp(70px,11vw,150px);color:var(--accent);font-weight:900;line-height:1}.break-number span{font-size:30px;margin-left:18px}
.teaching-controls{display:flex;align-items:center;gap:8px;padding:12px 24px;background:white;border-top:1px solid #c7c4ce;flex-wrap:wrap}
.teaching-controls button,.stage-dialog button{background:#f4f1f8;border:1px solid #bbb4cb;border-radius:6px;color:#242037;font:inherit;font-size:16px;min-height:44px;padding:8px 14px;cursor:pointer}
.teaching-controls .stage-next{margin-left:auto;background:var(--accent);color:white;border-color:var(--accent)}
.stage-page{font-size:15px;color:#4c465b;min-width:52px;text-align:center}.teaching-stage button:disabled{opacity:.35;cursor:default}
.teaching-stage [hidden]{display:none!important}.teaching-stage :focus-visible{outline:3px solid #e29415;outline-offset:3px}
.stage-dialog{color:#202335;background:#fff;border:0;border-radius:16px;padding:0;width:min(800px,92vw);max-height:88dvh;box-shadow:0 20px 70px #0005}
.stage-dialog::backdrop{background:#101624a8}.stage-dialog>header{display:flex;justify-content:space-between;align-items:center;padding:16px 24px;border-bottom:1px solid #ccc}.stage-dialog h2{font-size:24px;margin:0}
.stage-dialog-body{padding:20px 24px;max-height:calc(88dvh - 90px);overflow:auto;font-size:18px;line-height:1.7}.stage-links{display:flex;flex-wrap:wrap;gap:10px}.stage-links a{display:block;color:#3a258d;padding:10px 12px;border:1px solid #b8a8e2;border-radius:6px}
.stage-dialog pre{font:inherit;white-space:pre-wrap;word-break:break-word;padding:16px;background:#f2f0f7;max-height:38vh;overflow:auto}
.stage-status{color:#2d6239;font-size:16px}.standalone-stage{margin:0;background:#faf7ed}
.teaching-hub{border-top:6px solid #6541ce;background:#f1ecff;color:#272039;padding:22px;margin-bottom:26px;border-radius:4px 4px 14px 14px}.teaching-hub h3{font-size:24px;margin:8px 0 16px}.teaching-hub label{display:block;margin:12px 0;font-size:17px}.teaching-hub select{display:block;max-width:100%;padding:10px;margin-top:6px;font:inherit;color:#272039;border:1px solid #aaa0bd;background:white;border-radius:5px}.hub-links{display:flex;flex-wrap:wrap;gap:10px}.hub-links a,.stage-toolbar a{color:#502d95;padding:10px 14px;background:white;border:1px solid #c1b1da;border-radius:6px;text-decoration:none;font-size:16px}.instructor-current{margin:24px 0;border-left:6px solid #d3831a;background:#fff5df;padding:20px 24px;color:#392811}.instructor-current li{padding:6px 0}.supporting-library{margin:20px 0;padding:16px;border:1px solid #d5cddd;border-radius:8px}.supporting-library>summary{font-size:17px;cursor:pointer;color:#4c3c67;font-weight:700}.stage-toolbar{flex-wrap:wrap}.stage-toolbar a{pointer-events:auto}
@media(max-width:700px){.teaching-toolbar{padding:8px;gap:6px;flex-wrap:wrap}.teaching-toolbar label:first-child{max-width:100%;width:100%}.teaching-toolbar label:first-child select{width:100%}.teaching-toolbar select{font-size:14px}.stage-session{font-size:14px}.teaching-slide{padding:22px;gap:16px}.teaching-slide h1{font-size:28px}.layout-question{padding-right:24px}.layout-question h1{font-size:36px}.teaching-slide p{font-size:20px;line-height:1.55}.slide-steps{gap:16px}.slide-steps li{font-size:20px;line-height:1.5}.slide-compare{grid-template-columns:1fr;gap:16px;margin:0}.slide-compare section{padding:10px 0}.slide-compare h2{font-size:23px;margin:0 0 10px}.slide-compare p{font-size:23px}.slide-sources{gap:6px}.slide-sources li{font-size:18px;padding:7px 0}.slide-flow{grid-template-columns:1fr;gap:8px;margin:0}.slide-flow li{display:flex;gap:16px;font-size:20px;padding:5px 0;border:0}.slide-flow li::before{font-size:24px;margin:0}.teaching-controls{padding:8px;gap:6px}.teaching-controls button{font-size:14px;min-height:40px;padding:7px 9px}.stage-page{font-size:13px;min-width:40px}.slide-challenge p,.teaching-slide .slide-footnote{font-size:17px}.layout-prompt .slide-prompt{padding-left:14px;font-size:19px}}
@media(max-height:580px) and (min-width:701px){.teaching-slide{padding:18px 40px;gap:12px}.teaching-slide h1,.layout-question h1{font-size:36px}.teaching-slide p,.slide-steps li{font-size:22px}.slide-number{font-size:28px}.slide-flow{margin:8px 0}.slide-flow li::before{margin-bottom:6px}.slide-steps{gap:12px}.teaching-toolbar{padding:6px 18px}.teaching-controls{padding:6px 18px}}