:root{--bg:#0f172a;--card:#111827;--muted:#94a3b8;--text:#f8fafc;--line:#263244;--accent:#22c55e;--danger:#ef4444;--warn:#f59e0b}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;background:linear-gradient(180deg,#0f172a,#020617);color:var(--text);padding-bottom:78px}.topbar{position:sticky;top:0;z-index:3;display:flex;justify-content:space-between;align-items:center;padding:14px 16px;background:rgba(2,6,23,.88);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}.brand{font-weight:800;color:#fff;text-decoration:none}.logout{color:var(--muted);text-decoration:none;font-size:14px}.container{max-width:980px;margin:0 auto;padding:16px}.grid{display:grid;gap:14px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}@media(max-width:720px){.grid-2{grid-template-columns:1fr}}.card{background:rgba(17,24,39,.92);border:1px solid var(--line);border-radius:18px;padding:16px;box-shadow:0 16px 45px rgba(0,0,0,.22)}.card h1,.card h2,.card h3{margin-top:0}.muted{color:var(--muted)}.stat{font-size:28px;font-weight:900;margin:6px 0}.btn,button{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--accent);color:#052e16;border:0;border-radius:14px;padding:11px 14px;font-weight:800;text-decoration:none;cursor:pointer}.btn.secondary{background:#334155;color:#e2e8f0}.btn.danger{background:var(--danger);color:#fff}.btn.full,button.full{width:100%}input,select,textarea{width:100%;padding:12px;border-radius:13px;border:1px solid #334155;background:#020617;color:#fff;outline:none}label{display:block;margin:12px 0 6px;color:#cbd5e1;font-size:14px}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.table{width:100%;border-collapse:collapse}.table th,.table td{border-bottom:1px solid var(--line);padding:10px;text-align:left;vertical-align:top}.table th{color:#cbd5e1;font-size:13px}.pill{display:inline-block;padding:4px 9px;border-radius:999px;background:#1e293b;color:#cbd5e1;font-size:12px}.alert{padding:12px;border-radius:14px;margin-bottom:12px}.alert-success{background:#064e3b;color:#d1fae5}.alert-error{background:#7f1d1d;color:#fee2e2}.bottom-nav{position:fixed;bottom:0;left:0;right:0;z-index:5;display:grid;grid-template-columns:repeat(5,1fr);background:rgba(2,6,23,.95);border-top:1px solid var(--line);backdrop-filter:blur(10px)}.bottom-nav a{color:#cbd5e1;text-decoration:none;text-align:center;padding:12px 4px;font-size:12px}.footer{text-align:center;color:#64748b;font-size:12px;padding:24px}.login-wrap{min-height:70vh;display:grid;place-items:center}.login-card{width:100%;max-width:420px}.exercise-item{display:flex;justify-content:space-between;gap:10px;align-items:flex-start}.small{font-size:13px}.hr{height:1px;background:var(--line);margin:14px 0}