:root{--primary:#2f5bea;--primary-dark:#1e40af;--text:#1b2230;--muted:#5b6577;--border:#e2e6ec;--bg:#f5f7fa}*{box-sizing:border-box}html,body{height:100%;margin:0}body{color:var(--text);background:var(--bg);flex-direction:column;font-family:Be Vietnam Pro,system-ui,sans-serif;display:flex;overflow:hidden}[hidden]{display:none!important}.topbar{border-bottom:1px solid var(--border);background:#fff;flex-shrink:0;justify-content:space-between;align-items:center;gap:12px;height:64px;padding:0 24px;display:flex}.brand{align-items:center;gap:14px;display:flex}.logo{background:var(--primary);border-radius:10px;justify-content:center;align-items:center;width:36px;height:36px;display:flex}.title{font-size:16px;font-weight:700}.sub{color:var(--muted);font-size:12px}.pills{align-items:center;gap:10px;display:flex}.pill{white-space:nowrap;background:#eef2f8;border-radius:999px;align-items:center;gap:8px;padding:6px 12px;font-size:13px;font-weight:600;display:inline-flex}.live{color:#b42318;background:#fdecec}.live i{background:#d92d20;border-radius:50%;width:8px;height:8px}.wrap{flex:1;min-height:0;display:flex}#stage{flex:auto;min-width:0;min-height:0;position:relative;overflow:hidden}#stage canvas{display:block;position:absolute;inset:0}.labels{pointer-events:none;z-index:1;position:absolute;inset:0}.tag{color:var(--text);white-space:nowrap;background:#fff;border-radius:999px;padding:2px 8px;font-size:11px;font-weight:600;box-shadow:0 1px 3px #1b223040}.tag.me{background:var(--primary);color:#fff;box-shadow:0 0 0 3px #2f5bea4d}.tag.teacher{background:var(--text);color:#fff;font-size:12px}.views{z-index:2;background:#fff;border-radius:12px;gap:6px;padding:5px;display:flex;position:absolute;top:16px;left:16px;box-shadow:0 2px 8px #1b22301f}.viewbtn{height:36px;font:inherit;color:#39424f;cursor:pointer;background:0 0;border:0;border-radius:8px;padding:0 12px;font-size:13px;font-weight:600}.viewbtn[aria-pressed=true]{background:var(--primary);color:#fff}.viewbtn:hover:not([aria-pressed=true]){background:#eef2f8}.help{z-index:2;color:#39424f;background:#ffffffd9;border-radius:8px;padding:6px 10px;font-size:12px;position:absolute;bottom:14px;left:16px}aside{border-left:1px solid var(--border);background:#fff;flex-direction:column;flex:0 0 320px;gap:18px;min-height:0;padding:20px;display:flex;overflow:hidden}.card{border:1px solid var(--border);border-radius:14px;flex-direction:column;gap:12px;padding:18px;display:flex}.card h2{margin:0;font-size:18px}.card.mine{background:#eef3ff;border-color:#c7d5fb;gap:10px}.mine-label{color:var(--primary);font-size:13px;font-weight:600}.mine-name{font-size:18px;font-weight:700}.mine-place{color:#39424f;font-size:13px}label{color:#39424f;font-size:13px;font-weight:600}input{height:44px;font:inherit;color:var(--text);border:1px solid #c9d0da;border-radius:10px;padding:0 12px;font-size:15px}input:focus{outline:2px solid var(--primary);outline-offset:1px}.hint{color:var(--muted);font-size:12px;line-height:1.5}.primary{background:var(--primary);color:#fff;height:46px;font:inherit;cursor:pointer;border:0;border-radius:10px;font-size:15px;font-weight:600}.primary:hover{background:var(--primary-dark)}.primary:disabled{opacity:.5;cursor:default;background:var(--primary)}.ghost{height:44px;font:inherit;color:var(--text);cursor:pointer;background:#fff;border:1px solid #c9d0da;border-radius:10px;font-size:14px;font-weight:600}.rhead{justify-content:space-between;align-items:baseline;font-size:14px;font-weight:700;display:flex}.rhead span{color:var(--muted);font-size:12px;font-weight:400}#roster{flex-direction:column;flex:1;gap:2px;min-height:0;display:flex;overflow-y:auto}.rrow{border-radius:8px;align-items:center;gap:10px;padding:6px 8px;display:flex}.dot{border-radius:50%;flex-shrink:0;width:10px;height:10px}.rname{flex:1;font-size:14px}.rwhere{color:var(--muted);white-space:nowrap;font-size:12px}@media (width<=899px){.wrap{flex-direction:column}#stage{flex:55%}aside{border-left:0;border-top:1px solid var(--border);flex:45%}.views{flex-wrap:wrap}}