:root{font-family:Tahoma,Arial,sans-serif;color:#1c332e;background:#f6f6f0;font-size:16px;line-height:1.7;--green:#123d35;--muted:#65776e;--line:#dce3d9}*{box-sizing:border-box}body{margin:0}header,main,footer{max-width:1240px;margin:auto}header{padding:24px 32px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}a{color:inherit}.brand{text-decoration:none;font-weight:900;font-size:28px;display:flex;align-items:center;gap:16px}.brand span{font-size:14px;border-right:1px solid #acbdb1;padding-right:16px;font-weight:400}.account{display:flex;align-items:center;gap:12px;font-size:12px}main{padding:44px 32px 24px;min-height:75vh}h1{font-size:clamp(28px,4vw,48px);line-height:1.4;letter-spacing:-1px;margin:10px 0 28px}h2{font-size:20px;margin:0 0 14px}p{margin:0 0 18px}.eyebrow{font-size:12px;color:#647b62;letter-spacing:1px;margin:0 0 10px}.lead{max-width:560px;font-size:18px;color:var(--muted)}.hero{padding:28px 0}.hero h1{font-size:clamp(40px,6vw,70px);line-height:1.35}.button,button{display:inline-flex;align-items:center;justify-content:center;gap:25px;background:var(--green);color:white;border:1px solid var(--green);border-radius:8px;padding:12px 20px;font:inherit;font-size:14px;font-weight:700;text-decoration:none;cursor:pointer;min-height:46px}button:disabled{opacity:.5;cursor:wait}button:hover,.button:hover{filter:brightness(1.12)}.quiet{background:transparent;color:var(--green);border-color:#bbcab9}.danger{background:#fff5f2;color:#a03927;border-color:#e7c2b6}.muted{color:var(--muted)}.small{font-size:12px}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;border-top:1px solid var(--line);margin-top:60px;padding-top:24px}.steps b{color:#93a78b;font-size:14px}.steps h2{margin:14px 0 6px}.steps p{font-size:14px;color:var(--muted)}.panel{border:1px solid var(--line);background:#fffef9;padding:26px;border-radius:12px;margin-bottom:24px}.admin-grid{display:grid;grid-template-columns:360px 1fr;gap:24px}.student-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.row{display:grid;grid-template-columns:1fr 1fr;gap:14px}form{display:grid;gap:16px}label{display:grid;gap:6px;font-size:13px;font-weight:700}input,select{background:#fff;border:1px solid #cbd5c8;border-radius:6px;font:inherit;width:100%;padding:10px 12px;min-height:46px;color:#1c332e}input:disabled,select:disabled{background:#f0f2eb}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #c18a3d;outline-offset:3px}.section-head{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-bottom:16px}.section-head h1{font-size:32px;margin:0}.section-head h2{margin:0}.badge{display:inline-block;background:#edf2e8;color:#49623c;border-radius:20px;font-size:12px;padding:5px 12px;white-space:nowrap}.live-panel{display:flex;flex-direction:column}.live-body{display:flex;align-items:center;justify-content:space-around;gap:20px;flex:1;padding:10px 0 26px}.live-body img{max-width:60%;height:auto;image-rendering:auto}.qr-empty{padding:50px 16px;text-align:center;background:#f3f5ed;border:1px dashed #bccab5;border-radius:8px;color:var(--muted)}#counter{display:block;font-size:74px;line-height:1.4;font-weight:400;font-variant-numeric:tabular-nums}.actions{display:flex;flex-wrap:wrap;gap:10px}#notice{padding:14px 20px;background:#eaf4e5;border:1px solid #bdd3b1;border-radius:8px;margin-bottom:24px;white-space:pre-line}#notice.error{background:#fff0e9;border-color:#e2b5a0;color:#943f27}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;text-align:right;white-space:nowrap;font-size:13px}th,td{border-bottom:1px solid var(--line);padding:14px 10px}th{color:var(--muted);font-weight:400}td small{display:block;color:var(--muted);direction:ltr;text-align:right}.lecture-row,.history-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:15px 0;border-bottom:1px solid var(--line)}.lecture-row button{padding:7px 12px;min-height:40px}.privacy{border-top:1px solid var(--line);margin-top:36px;padding-top:24px;color:var(--muted);font-size:12px;max-width:850px}.privacy h2{font-size:14px}footer{border-top:1px solid var(--line);padding:24px 32px;display:flex;justify-content:space-between;font-size:12px;color:var(--muted)}[hidden]{display:none!important}@media(max-width:900px){.admin-grid{grid-template-columns:1fr}.section-head{flex-wrap:wrap}.section-head h1{font-size:27px}.live-body{min-height:270px}}@media(max-width:620px){header{padding:16px 20px;align-items:flex-start}.account{flex-direction:column;align-items:flex-end;max-width:60%;overflow-wrap:anywhere}.account button{font-size:11px;padding:6px 10px;min-height:35px}main{padding:28px 18px}.panel{padding:20px}.student-grid,.steps{grid-template-columns:1fr}.steps{gap:18px}.steps article{border-bottom:1px solid var(--line)}.live-body{flex-direction:column}.live-body img{max-width:100%}#counter{font-size:60px}.live-body>div:last-child{text-align:center}.actions>*{flex:1}footer{padding:20px;gap:20px;font-size:10px}.badge{white-space:normal}}