:root{--bg:#0d1320;--panel:#172033;--panel2:#202c43;--text:#f5f7fb;--muted:#aeb9cc;--accent:#68c4ff;--good:#73d69b;--warn:#ffd166;--bad:#ff7b7b;--line:#34415b;--shadow:0 12px 36px rgba(0,0,0,.28)}
*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at top,#1a2944 0,#0d1320 45%,#090d15 100%);color:var(--text);font:16px/1.45 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;min-height:100vh;display:flex;flex-direction:column}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.site-header{display:flex;align-items:center;gap:20px;flex-wrap:wrap;padding:14px 24px;background:#0a101bde;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5;backdrop-filter:blur(8px)}.brand{font-size:1.35rem;font-weight:800;color:#fff;text-decoration:none}.site-header nav{display:flex;gap:14px;flex-wrap:wrap}.site-header nav a{color:#d7e4f7}.identity{margin-left:auto;color:var(--warn);font-weight:700}.container{width:min(1100px,94vw);margin:30px auto;flex:1}.container.wide{width:min(1380px,96vw)}footer{text-align:center;padding:18px;color:var(--muted);font-size:.9rem;border-top:1px solid #202a3d}.card{background:linear-gradient(180deg,var(--panel),#111a2a);border:1px solid var(--line);border-radius:16px;padding:22px;box-shadow:var(--shadow);margin-bottom:20px}.hero{text-align:center;padding:40px 24px}.hero h1{font-size:clamp(2rem,5vw,3.8rem);margin:.1em 0}.hero p{color:var(--muted);font-size:1.1rem}.grid{display:grid;gap:16px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.grid.four{grid-template-columns:repeat(4,minmax(0,1fr))}.dashboard a.tile{display:block;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:24px;color:#fff;font-weight:750;min-height:92px}.dashboard a.tile:hover{background:var(--panel2);text-decoration:none;transform:translateY(-1px)}button,.button,input[type=submit]{appearance:none;border:0;border-radius:10px;background:#2d8fcb;color:#fff;padding:11px 18px;font-weight:750;cursor:pointer;font-size:1rem}.button{display:inline-block;text-decoration:none}.button.secondary,button.secondary{background:#3b4961}.button.danger,button.danger{background:#aa3f4b}.button.good,button.good{background:#2e8f5f}button:disabled{opacity:.45;cursor:not-allowed}label{display:block;font-weight:700;margin:12px 0 6px}input,select,textarea{width:100%;padding:11px 12px;border-radius:9px;border:1px solid #4b5870;background:#0c1422;color:#fff;font:inherit}input[type=checkbox]{width:auto}.form-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.flash{padding:12px 15px;border-radius:10px;margin:10px 0 18px;border:1px solid}.flash.success{background:#133626;border-color:#2e8f5f}.flash.error{background:#411d24;border-color:#aa3f4b}.flash.info{background:#162f48;border-color:#2d8fcb}.muted{color:var(--muted)}.small{font-size:.88rem}.badge{display:inline-block;padding:3px 9px;border-radius:999px;background:#2b3851;color:#dce6f7;font-size:.8rem}.badge.easy{background:#1f6a46}.badge.medium{background:#376ca5}.badge.hard{background:#8a6820}.badge.expert{background:#8b3543}table{width:100%;border-collapse:collapse;background:#111a2a;border-radius:12px;overflow:hidden}th,td{padding:10px;border-bottom:1px solid #2b3850;text-align:left}th{background:#1e2a40;color:#cfe4ff}.scroll-x{overflow-x:auto}.notice{padding:14px;border-left:4px solid var(--warn);background:#332b17;border-radius:8px}.error-box{padding:14px;border-left:4px solid var(--bad);background:#35191d;border-radius:8px}.success-box{padding:14px;border-left:4px solid var(--good);background:#153024;border-radius:8px}.hidden{display:none!important}
@media(max-width:800px){.grid.two,.grid.three,.grid.four,.form-row{grid-template-columns:1fr}.site-header{padding:12px 14px}.identity{width:100%;margin-left:0}.container{margin:18px auto}}