:root{--bg:#0f172a;--card:#1e293b;--ink:#e2e8f0;--accent:#38bdf8;--mute:#94a3b8;--line:#334155}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,sans-serif;background:var(--bg);color:var(--ink)}
header{display:flex;align-items:center;gap:.75rem;padding:.6rem 1.5rem;border-bottom:1px solid var(--line)}
.logo{width:40px;height:40px;border-radius:8px;object-fit:contain}
h1{margin:0;font-size:1.3rem;color:var(--accent)}
.by{color:var(--mute);font-size:.85rem;margin-top:.2rem}
.layout{display:grid;grid-template-columns:240px 1fr;min-height:calc(100vh - 61px)}
aside{border-right:1px solid var(--line);padding:1rem .75rem;background:#0b1222}
.grp{margin-bottom:1.2rem}
.grp h3{margin:0 0 .4rem;padding:0 .5rem;font-size:.75rem;text-transform:uppercase;letter-spacing:.06em;color:var(--mute)}
aside button{display:block;width:100%;text-align:left;background:none;border:0;border-radius:8px;color:var(--ink);padding:.5rem .7rem;cursor:pointer;font-size:.95rem}
aside button:hover{background:var(--card)}
aside button.on{background:var(--accent);color:#0f172a;font-weight:600}
main{display:grid;gap:1rem;padding:1rem 1.5rem;align-content:start;max-width:900px;width:100%}
.card{background:var(--card);padding:1rem 1.2rem;border-radius:12px}
.card h2{margin-top:0;font-size:1.05rem}
label{display:block;margin:.4rem 0;color:var(--mute)}
input{background:#0f172a;color:var(--ink);border:1px solid var(--line);border-radius:6px;padding:.3rem .5rem;width:6.5rem}
table{width:100%;border-collapse:collapse;margin:.6rem 0}
th,td{text-align:left;padding:.3rem;border-bottom:1px solid var(--line)}
main button{cursor:pointer}
.big{font-size:1.1rem}
.big b{color:var(--accent)}
@media(max-width:700px){.layout{grid-template-columns:1fr}aside{border-right:0;border-bottom:1px solid var(--line)}}