:root{--bg:#202020;--surface:#292929;--text:#fffdee;--muted:#c4c4c4;--line:#515151;--sun:#ffcb00;--cyan:#0189ac;--red:#bc430d}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 90% 0,#063748 0,transparent 45%),var(--bg);color:var(--text);font:16px/1.7 system-ui,-apple-system,"Segoe UI",sans-serif}header{border-top:5px solid transparent;border-image:linear-gradient(90deg,#ffb000,#ffca00 25%,#0189ac 50%,#8c8c8c 75%,#a90000) 1;border-bottom:1px solid var(--line);padding:22px max(20px,calc((100vw - 900px)/2))}header a,.brand{color:var(--text);text-decoration:none}.brand{font-size:24px;font-weight:800}.brand em{color:var(--sun);font-family:cursive;font-weight:500}main{max-width:900px;margin:auto;padding:36px 22px 80px}h1{line-height:1.15;font-size:clamp(30px,5vw,44px)}h2{font-size:21px;border-left:4px solid var(--sun);padding-left:13px;margin-top:34px}h3{font-size:17px}p,li{color:#e0e0e0}a{color:#5adef2}small,.muted{color:var(--muted)}.sheet{background:var(--surface);border:1px solid var(--line);padding:24px;border-radius:20px}.warning{background:#513a18;border:1px solid #ba8019;border-radius:12px;padding:18px;margin:24px 0;color:#fff2d7}.alert{font-weight:750}.nav{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}.nav a{font-size:13px;background:#393939;padding:8px 12px;border-radius:8px}footer{border-top:1px solid var(--line);text-align:center;padding:24px;color:var(--muted);font-size:13px}form{display:grid;gap:12px}label{display:block;font-weight:600}input,textarea{font:inherit;width:100%;padding:11px 13px;border-radius:10px;border:1px solid #777;background:#1b1b1b;color:#fff}button{border:none;border-radius:10px;background:linear-gradient(90deg,#ef8700,#ffcf00);padding:13px 18px;font-size:15px;font-weight:800;cursor:pointer}button:disabled{opacity:.5;cursor:not-allowed}