:root{--navy:#0f172a;--blue:#2563eb;--teal:#0f766e;--bg:#f1f5f9;--card:#fff;--line:#dbe4ef;--muted:#64748b;--danger:#dc2626;--radius:18px}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--navy);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.5}button,input,select{font:inherit}button,a{touch-action:manipulation}.shell{width:min(1180px,100%);margin:auto;padding:0 18px}.topbar{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.94);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}.nav{min-height:68px;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{font-size:1.05rem;font-weight:850;color:var(--navy)}.navlinks{display:flex;align-items:center;gap:7px}.navlinks a{color:#334155;text-decoration:none;font-size:.88rem;font-weight:700;padding:9px 12px;border-radius:11px}.navlinks a:hover,.navlinks a.active{background:#e8f0ff;color:#1d4ed8}.main{padding-top:30px;padding-bottom:60px}.eyebrow{margin:0;color:var(--blue);font-size:.8rem;font-weight:850;letter-spacing:.12em;text-transform:uppercase}h1{margin:4px 0 5px;font-size:clamp(1.8rem,5vw,2.6rem);line-height:1.12}h2{margin:0;font-size:1.08rem}.muted{color:var(--muted);margin:4px 0 0}.grid{display:grid;gap:18px}.two{grid-template-columns:repeat(2,minmax(0,1fr))}.admin-grid{grid-template-columns:350px minmax(0,1fr);margin-top:18px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:0 8px 30px rgba(15,23,42,.045)}.stack{display:grid;gap:12px}.field label{display:block;margin-bottom:6px;font-size:.88rem;font-weight:750}.control{display:block;width:100%;min-width:0;border:1px solid #cbd5e1;border-radius:12px;background:#fff;padding:11px 13px;color:var(--navy);outline:none}.control:focus{border-color:#3b82f6;box-shadow:0 0 0 4px #dbeafe}.control[readonly]{background:#f8fafc;color:#64748b}.btn{border:0;border-radius:12px;padding:11px 15px;font-weight:800;cursor:pointer;text-decoration:none;text-align:center}.btn-primary{background:var(--blue);color:#fff}.btn-dark{background:var(--navy);color:#fff}.btn-danger{background:var(--danger);color:#fff}.btn-soft{background:#e8f0ff;color:#1d4ed8}.btn:disabled{opacity:.42;cursor:not-allowed}.toolbar{display:flex;flex-wrap:wrap;gap:9px;padding:16px;border-bottom:1px solid var(--line)}.toolbar .control{flex:1;min-width:180px}.table-wrap{overflow-x:auto}.table{width:100%;min-width:640px;border-collapse:collapse;font-size:.9rem}.table th,.table td{padding:12px 14px;border-bottom:1px solid #edf2f7;text-align:left}.table th{background:#f8fafc;color:#475569;font-size:.78rem;text-transform:uppercase;letter-spacing:.04em}.periods{display:grid;gap:10px;margin-top:14px}.period{display:flex;justify-content:space-between;gap:12px;padding:13px;border:1px solid #e2e8f0;border-radius:13px;background:#f8fafc}.period strong{display:block}.period small{color:var(--muted)}.quick{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0}.quick a{background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 14px;color:#1e40af;text-decoration:none;font-weight:800}.login{min-height:100vh;display:grid;place-items:center;padding:20px;background:linear-gradient(145deg,#eaf2ff,#ecfeff)}.login-card{width:min(390px,100%);background:#fff;border:1px solid #dbe4ef;border-radius:24px;padding:28px;box-shadow:0 24px 70px rgba(15,23,42,.12)}.login-card .btn{width:100%;margin-top:12px}.alert{padding:11px 13px;border-radius:11px;background:#fef2f2;color:#b91c1c;font-weight:700;margin-top:14px}@media(max-width:760px){.two,.admin-grid{grid-template-columns:1fr}.nav{align-items:flex-start;padding:12px 0}.navlinks{max-width:68vw;overflow-x:auto}.navlinks a{white-space:nowrap;padding:8px 10px}.main{padding-top:22px}.card{padding:16px}.period{display:block}.period .btn{display:inline-block;margin-top:9px}.toolbar .btn{flex:1}.table{min-width:560px}}