*{box-sizing:border-box}:root{--bg:#f5f7fb;--card:#fff;--ink:#172033;--muted:#6b7280;--line:#e4e7ee;--blue:#3157d5;--blue2:#eef2ff;--red:#b42318;--green:#14804a;--shadow:0 12px 34px rgba(23,32,51,.08)}
body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif}a{color:inherit;text-decoration:none}.wrap{width:min(1120px,calc(100% - 32px));margin:auto}
header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.bar{min-height:68px;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{font-weight:900;font-size:20px}.muted{color:var(--muted)}main{padding:30px 0 60px}
.hero{background:linear-gradient(135deg,#243b7a,#3157d5);color:#fff;padding:32px;border-radius:24px;margin-bottom:22px}.hero h1{margin:0 0 8px;font-size:clamp(28px,5vw,46px)}.hero p{margin:0;opacity:.9}
.btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);background:#fff;color:var(--ink);padding:10px 14px;border-radius:11px;font-weight:800;cursor:pointer}.btn.primary{background:var(--blue);color:#fff;border-color:var(--blue)}.btn.danger{background:#fff1f0;color:var(--red);border-color:#ffd0cc}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.exercise{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:var(--shadow);display:flex;flex-direction:column;min-height:180px}.exercise h3{margin:12px 0 8px}.exercise .meta{font-size:13px;color:var(--muted);margin-bottom:18px}.exercise .btn{margin-top:auto}
.card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px;box-shadow:var(--shadow);margin-bottom:18px}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:18px}.stat{background:#fff;border:1px solid var(--line);border-radius:15px;padding:15px}.stat span{font-size:12px;color:var(--muted);font-weight:800;text-transform:uppercase}.stat b{display:block;font-size:28px;margin-top:4px}
table{width:100%;border-collapse:collapse;background:#fff}th,td{padding:12px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}th{font-size:12px;color:var(--muted);text-transform:uppercase}.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:15px;background:#fff}
input[type=text],input[type=password],input[type=file]{width:100%;padding:11px 12px;border:1px solid #cfd5df;border-radius:10px;font:inherit}.field{margin-bottom:14px}.field label{display:block;font-size:13px;font-weight:800;margin-bottom:6px}
.alert{padding:11px 13px;border-radius:11px;margin-bottom:14px}.alert.ok{background:#ecfdf3;color:#087545}.alert.bad{background:#fff0ef;color:#9b2923}.login{width:min(440px,calc(100% - 32px));margin:9vh auto;background:#fff;border:1px solid var(--line);border-radius:22px;padding:26px;box-shadow:var(--shadow)}
.toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;justify-content:space-between;margin-bottom:16px}.pill{display:inline-block;padding:5px 9px;border-radius:999px;background:var(--blue2);color:#284bb2;font-weight:800;font-size:12px}.empty{padding:28px;text-align:center;color:var(--muted)}
iframe.runner{width:100%;height:calc(100vh - 55px);border:0;background:#fff}.runner-page{overflow:hidden;background:#fff}
@media(max-width:800px){.grid{grid-template-columns:1fr 1fr}.stats{grid-template-columns:1fr 1fr}}@media(max-width:560px){.grid{grid-template-columns:1fr}.bar{padding:10px 0}.hero{padding:24px}}