:root{color-scheme:dark;--bg:#020b10;--card:#071821;--line:#183947;--txt:#effaff;--muted:#79b6ca;--green:#18e34d}
*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:var(--txt);font:14px Arial,sans-serif}.topo{height:52px;padding:0 14px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:#06141b}.topo a{color:var(--txt);text-decoration:none;border:1px solid var(--line);border-radius:7px;padding:7px 10px}.topo b{font-size:16px}.topo b i{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 9px var(--green)}.topo span,.topo small{color:var(--muted)}.grade{height:calc(100vh - 52px);padding:7px;display:grid;grid-template-columns:1fr 1fr;grid-template-rows:1fr 1fr;gap:7px}.grade section{min-width:0;min-height:0;position:relative;border:1px solid var(--line);border-radius:9px;overflow:hidden;background:var(--card)}.grade h2{position:absolute;z-index:3;right:12px;top:5px;margin:0;padding:4px 9px;border:1px solid #245365;border-radius:6px;background:#061820;color:var(--green);font-size:13px}.grade iframe{width:100%;height:100%;border:0;background:#031018}
@media(max-width:900px){.topo small,.topo span{display:none}.grade{height:auto;grid-template-columns:1fr;grid-template-rows:none}.grade section{height:680px}}