:root{font:16px/1.6 system-ui,-apple-system,sans-serif;color:#302744;background:#faf6f7}*{box-sizing:border-box}body{margin:0}header{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:20px max(24px,calc((100vw - 1120px)/2));background:white;border-bottom:1px solid #e8dfef}.brand{font-size:26px;font-weight:850;color:#7042bc;text-decoration:none}.brand span{font-size:14px;font-weight:500;color:#726881}main{max-width:1168px;padding:40px 24px;margin:auto;min-height:75vh}h1{font-size:clamp(30px,5vw,46px);line-height:1.15;letter-spacing:-1.5px}h2{margin-top:0}.eyebrow{color:#7042bc;font-size:13px;font-weight:800;letter-spacing:1px;text-transform:uppercase}.panel{background:#fff;border:1px solid #e8dfef;border-radius:24px;padding:30px;margin-bottom:24px}.narrow{max-width:480px;margin:25px auto}.grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}label{display:block;font-weight:650;margin:16px 0}input{display:block;width:100%;min-height:46px;margin-top:6px;padding:10px;border:1px solid #cfc5db;border-radius:10px;font:inherit}input[type=color]{width:100px;padding:4px}button{font:inherit;font-weight:750;border:0;border-radius:24px;padding:12px 22px;background:#7042bc;color:#fff;cursor:pointer}.secondary{background:#f0e7fa;color:#6033a5}.muted,footer{color:#726881;font-size:14px}footer{text-align:center;padding:24px}.message{padding:16px 20px;background:#e5f5eb;border-radius:12px}.error{background:#ffe7e9;color:#8c1c36}article{border-top:1px solid #e8dfef;padding:16px 0;overflow-wrap:anywhere}article h3{margin:0}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #00a9bf;outline-offset:3px}@media(max-width:760px){.grid{grid-template-columns:1fr}.panel{padding:22px}header{padding:16px}.brand span{display:block}main{padding:24px 16px}}
input[type=checkbox]{display:inline-block;width:20px;min-height:20px;vertical-align:middle;margin-right:8px}summary{cursor:pointer;font-weight:750}article form+form{margin-top:12px}input[readonly]{font-size:14px}details>form{margin-top:18px}
.classroom{margin-bottom:24px;border:1px solid #e8dfef;border-radius:24px;overflow:hidden;background:#fff}.classroom-toolbar{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:22px 28px}.classroom-toolbar .eyebrow{margin:0 0 5px}.classroom-toolbar h2{margin:0;overflow-wrap:anywhere}.classroom-settings-link{color:#7042bc;font-weight:700;white-space:nowrap}.classroom-stage{position:relative;aspect-ratio:16/9;min-height:240px;border-top:1px solid #e8dfef}.classroom-background{position:absolute;inset:0;display:block}.classroom-controls{display:grid;grid-template-columns:minmax(0,1fr) 180px;gap:24px;max-width:760px}.classroom-save{display:flex;align-items:center;flex-wrap:wrap;gap:18px}#classroom-settings{scroll-margin-top:20px}@media(max-width:760px){.classroom-toolbar{padding:20px;align-items:flex-start;flex-direction:column;gap:12px}.classroom-controls{grid-template-columns:1fr;gap:0}.classroom-stage{min-height:220px}.classroom-save{gap:8px}}
.classroom-clock{position:absolute;z-index:1;display:flex;flex-direction:column;align-items:center;justify-content:center;width:190px;min-height:126px;padding:12px 18px;border-radius:20px;background:#fffffff2;color:#302744;box-shadow:0 8px 28px #30274424;touch-action:none;user-select:none;cursor:grab;font-variant-numeric:tabular-nums}.classroom-clock[hidden]{display:none}.classroom-clock.dragging{cursor:grabbing}.classroom-clock time{font-size:42px;line-height:1.3;letter-spacing:-1px}.clock-handle{font-size:12px;color:#726881}.clock-date{font-size:13px;font-weight:500}.clock-settings{border:1px solid #e8dfef;border-radius:14px;margin:8px 0 22px;padding:12px 18px}.clock-settings legend{font-weight:750}@media(max-width:540px){.classroom-clock{width:150px;min-height:110px;padding:10px}.classroom-clock time{font-size:34px}}
.classroom-tool{position:absolute;z-index:2;width:180px;border-radius:18px;background:#fff;box-shadow:0 8px 28px #30274424;overflow:hidden}.classroom-tool[hidden]{display:none}.tool-handle{display:block;width:100%;border-radius:0;padding:8px;background:#f0e7fa;color:#6033a5;font-size:12px;cursor:grab;touch-action:none;user-select:none}.dragging .tool-handle{cursor:grabbing}.tool-launch{display:flex;flex-direction:column;align-items:center;padding:12px;color:#302744;text-decoration:none}.tool-launch>span{font-size:36px;line-height:1.2}.tool-launch strong{font-size:17px}.tool-launch small{font-size:12px;color:#7042bc}.tool-launch:hover{background:#faf6f7}.tool-handle:focus-visible,.tool-launch:focus-visible{outline-offset:-4px}@media(max-width:540px){.classroom-tool{width:150px}.tool-launch{padding:8px}.tool-launch>span{font-size:28px}.tool-launch strong{font-size:15px}}