:root{--blue:#07559a;--deep:#082f54;--black:#121820;--paper:#fff;--bg:#eef3f7;--purple:#6f3fa0;--green:#38904a;--gray:#6e7780;--line:#163a59}*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--black)}a{color:var(--blue)}.shell{max-width:1100px;margin:auto;padding:24px}.brand{display:flex;align-items:center;gap:14px}.stem{display:grid;grid-template-columns:repeat(2,22px);gap:3px}.stem i{width:22px;height:22px}.stem i:nth-child(1){background:var(--purple)}.stem i:nth-child(2){background:var(--green)}.stem i:nth-child(3){background:var(--blue)}.stem i:nth-child(4){background:var(--gray)}.topbar{background:var(--deep);color:white;padding:16px 24px;display:flex;justify-content:space-between;align-items:center}.topbar a{color:white;margin-left:18px}.card{background:white;border:2px solid #cad6df;border-radius:14px;padding:20px;margin:18px 0;box-shadow:0 4px 15px #17354f12}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}label{font-weight:700}input,select,textarea{display:block;width:100%;margin-top:6px;padding:11px;border:1px solid #8798a6;border-radius:7px;font:inherit}textarea{min-height:100px}button,.button{display:inline-block;border:0;border-radius:8px;padding:11px 17px;background:var(--blue);color:white;font-weight:700;text-decoration:none;cursor:pointer}.notice{padding:12px 15px;border-radius:8px;background:#dff2e3;color:#175927;margin:15px 0}.error{background:#fee4e2;color:#8b2018}.class-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.board{height:100dvh;padding:1.2vh 1.2vw;display:grid;grid-template-rows:11vh 1fr;gap:1.2vh;background:linear-gradient(135deg,#edf4f8,#d9e6ef);overflow:hidden}.board-top{display:grid;grid-template-columns:15vw 1fr 15vw;gap:1vw}.panel{border:clamp(2px,.18vw,4px) solid var(--black);border-radius:1vw;display:flex;align-items:center;justify-content:center;background:white;box-shadow:0 .5vh 0 #0002}.day,.date{background:#1685cf;color:white;flex-direction:column}.course{background:var(--deep);color:white;font-size:clamp(30px,3.7vw,76px);font-weight:800;text-align:center}.date{font-size:clamp(22px,2.6vw,52px);font-weight:800}.day small{font-size:clamp(12px,1vw,20px)}.day strong{font-size:clamp(25px,2.4vw,50px)}.board-body{min-height:0;display:grid;grid-template-columns:var(--agenda-width,49%) minmax(0,1fr);gap:1.2vw;transition:grid-template-columns .35s ease}.board-card{background:white;border:clamp(2px,.16vw,4px) solid var(--black);border-radius:1vw;padding:1.4vh 1.4vw;overflow:hidden}.right{display:grid;grid-template-rows:var(--right-rows,1fr 1.05fr .8fr);gap:1.2vh;transition:grid-template-rows .35s ease;min-height:0}.label{font-size:clamp(22px,2.2vw,46px);font-weight:800;text-transform:uppercase;color:var(--deep);border-bottom:.5vh solid var(--blue);margin-bottom:1vh}.agenda ol{font-size:clamp(24px,2.35vw,49px);line-height:1.18;margin:.3vh 0}.board-text{font-size:clamp(23px,2.15vw,44px);line-height:1.18;white-space:pre-wrap}.board-videos{font-size:clamp(18px,1.7vw,34px);margin:.3vh 0;padding-left:1.4em}.display-note{position:fixed;right:8px;bottom:5px;opacity:.12}.display-note:hover{opacity:1}.display-note a{background:white;color:var(--deep);padding:7px 11px;border-radius:20px;text-decoration:none}@media(max-width:750px){.grid,.class-grid{grid-template-columns:1fr}.shell{padding:14px}}
.help{color:#556b7a}.demo-shell{display:grid;grid-template-columns:minmax(300px,32vw) 1fr;height:100dvh}.demo-controls{overflow:auto;padding:18px;background:#eef3f7}.demo-preview{min-width:0}.demo-preview .board{height:100dvh}.demo-controls textarea{min-height:78px}.demo-controls h1{margin-top:0}@media(max-width:900px){.demo-shell{display:block;height:auto}.demo-preview .board{height:760px}.demo-controls{overflow:visible}}