:root{color-scheme:dark;--bg:#0b121d;--ink:#eaf0f8;--muted:#9eaec2;--accent:#71ead2;--line:#27364a;--blue:#80baff}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.65}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}button,input,select{font:inherit}button,.primary{border:0;background:var(--accent);color:#07131a;padding:12px 20px;border-radius:8px;font-weight:650;cursor:pointer}button:hover,.primary:hover{background:#a1f7e7;text-decoration:none}button:disabled{opacity:.5;cursor:wait}input,select{background:#142030;color:var(--ink);border:1px solid #3c5069;border-radius:7px;padding:10px 12px;max-width:100%}:focus-visible{outline:3px solid var(--blue);outline-offset:4px}.site-nav{display:flex;align-items:center;gap:28px;margin:auto;max-width:1200px;padding:22px 28px;border-bottom:1px solid var(--line)}.site-nav .brand{letter-spacing:.14em;font-size:13px;font-weight:800;margin-right:auto;color:var(--ink)}.site-nav>a:not(.brand){font-size:14px;color:var(--muted)}main{max-width:1120px;margin:auto;padding:0 28px}.hero{padding:90px 0 55px}.eyebrow{color:var(--accent);font-size:13px;font-weight:650;letter-spacing:.1em;text-transform:uppercase}h1,h2,h3{line-height:1.18;font-weight:680;letter-spacing:-.035em}h1{font-size:clamp(38px,6vw,76px);max-width:950px;margin:22px 0}.cursor{color:var(--accent);letter-spacing:0}.intro{font-size:21px;line-height:1.55;max-width:690px;color:var(--muted)}.hero-links{display:flex;gap:25px;align-items:center;flex-wrap:wrap;margin:30px 0 42px}.course-facts{display:flex;gap:48px;color:var(--muted);font-size:14px}.course-facts strong{font-size:28px;color:var(--ink);margin-right:7px}.join-section{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:28px 0 32px;margin-bottom:70px}.join-section h2{font-size:26px;margin:0 0 12px}.join-section p{color:var(--muted)}#join-form{max-width:600px}#join-form label{display:block;font-size:13px;margin-bottom:8px}#join-form>div{display:flex;gap:10px}#join-form input{flex:1;min-width:0;letter-spacing:.1em}#join-error,.error{color:#ffaeae;min-height:24px}.curriculum>h2,.closing>h2{font-size:36px}.section-intro{color:var(--muted);font-size:18px}.week{display:grid;grid-template-columns:135px 1fr;gap:24px;border-top:1px solid var(--line);padding:32px 0}.week-date{display:flex;flex-direction:column;color:var(--muted);font-size:13px}.week-date strong{font-size:28px;color:var(--ink);line-height:1.5}.week-date span{color:var(--accent)}.lesson-row{display:flex;gap:20px;margin-bottom:28px}.lesson-row:last-child{margin-bottom:0}.lesson-number{font-variant-numeric:tabular-nums;color:#536a87;font-size:20px;padding-top:3px}.lesson-row h3{font-size:23px;margin:0 0 8px;letter-spacing:-.02em}.lesson-row p{color:var(--muted);font-size:15px;max-width:700px;margin:0 0 10px}.lesson-row 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h1{font-size:42px}.intro{font-size:18px}.hero-links{gap:18px}.course-facts{gap:14px;flex-wrap:wrap}.course-facts strong{font-size:23px}.week{grid-template-columns:1fr;gap:15px}.week-date{flex-direction:row;align-items:center;gap:14px}.week-date strong{font-size:23px}.lesson-row{gap:13px}.lesson-row h3{font-size:21px}.curriculum>h2,.closing>h2{font-size:29px}.document h1{font-size:29px}.document h2{font-size:23px}#join-form>div{flex-direction:column}.control-buttons button{font-size:23px;min-height:95px}.qr{width:150px;height:150px}.room-code{font-size:23px}.current-title{font-size:24px}.teacher-notes{padding:16px;font-size:15px}.room-info{gap:15px}.room-link{font-size:13px}}
.control-top>div{min-width:0;max-width:100%}.control-top select{max-width:100%;width:100%}@media(max-width:650px){.control-top>div{width:100%}.controller #rooms{width:100%}.controller .control-buttons{position:sticky;bottom:12px;z-index:10;background:var(--bg);padding:8px 0}.controller .room-info{display:grid;grid-template-columns:minmax(0,1fr) 100px;align-items:start}.controller .qr{width:100px;height:100px}.controller .room-code{font-size:19px;letter-spacing:.04em}.controller #copy-link{font-size:12px;padding:9px}.controller{padding-bottom:90px}}

.controller.room-active .setup-panel:not([open]){margin-bottom:16px}.setup-panel summary{cursor:pointer;color:var(--accent);padding:10px 0}
.document img[src$=".svg"]{display:block;width:100%;height:auto;background:#101826;border:1px solid #334b67;border-radius:8px;margin:24px 0;padding:12px;box-sizing:border-box}