:root{--navy:#172554;--blue:#2563eb;--sky:#eff6ff;--ink:#172033;--muted:#64748b;--line:#e2e8f0;--bg:#f5f7fb;--white:#fff;--red:#dc2626;--green:#15803d}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,Segoe UI,Arial,sans-serif}.topbar{min-height:72px;background:var(--navy);display:flex;align-items:center;justify-content:space-between;padding:0 max(4vw,24px);gap:24px}.brand{color:#fff;text-decoration:none;font-weight:750;font-size:18px;display:flex;align-items:center;gap:10px}.brand span{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;background:var(--blue)}nav{display:flex;align-self:stretch}nav a{display:flex;align-items:center;padding:0 18px;color:#cbd5e1;text-decoration:none;border-bottom:3px solid transparent}nav a:hover,nav a.active{color:#fff;border-color:#60a5fa}.container{width:min(1180px,92%);margin:36px auto;min-height:calc(100vh - 170px)}h1,h2,p{margin-top:0}h1{font-size:clamp(28px,4vw,42px);letter-spacing:-1.2px;margin-bottom:10px}h2{font-size:20px}.eyebrow{text-transform:uppercase;color:var(--blue);font-weight:800;letter-spacing:1.5px;font-size:12px;margin-bottom:8px}.hero{background:linear-gradient(120deg,#fff 50%,#eaf2ff);padding:38px;border-radius:18px;display:flex;justify-content:space-between;align-items:center;gap:30px;border:1px solid var(--line)}.hero p:not(.eyebrow){color:var(--muted);margin:0}.btn{display:inline-flex;border:0;border-radius:9px;padding:11px 17px;text-decoration:none;font-weight:700;cursor:pointer;font-size:14px;justify-content:center}.btn.primary{background:var(--blue);color:#fff}.btn.secondary{background:#edf2f7;color:var(--ink)}.btn:disabled{opacity:.5}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:20px 0}.stats article,.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px}.stats span{color:var(--muted);font-size:14px}.stats strong{display:block;font-size:30px;margin-top:9px}.card{margin-bottom:20px}.section-title,.page-head{display:flex;align-items:center;justify-content:space-between;gap:16px}.page-head{margin-bottom:22px}.page-head span{color:var(--muted)}.grid-layout{display:grid;grid-template-columns:minmax(280px,360px) 1fr;gap:20px;align-items:start}.form-card{position:sticky;top:20px}form label{display:block;font-size:13px;font-weight:700;margin-bottom:15px}input,select{width:100%;padding:11px 12px;margin-top:6px;border:1px solid #cbd5e1;border-radius:8px;background:#fff;color:var(--ink);font:inherit}input:focus,select:focus{outline:3px solid #dbeafe;border-color:var(--blue)}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.actions,.row-actions{display:flex;gap:8px}.search{display:flex;gap:8px;margin-bottom:16px}.search input{margin:0}.table-wrap{overflow:auto}table{border-collapse:collapse;width:100%;font-size:14px}th{text-align:left;color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.5px;padding:12px 10px;border-bottom:2px solid var(--line)}td{padding:14px 10px;border-bottom:1px solid var(--line);vertical-align:middle}td small{display:block;color:var(--muted);margin-top:4px}.row-actions a,.row-actions button{border:0;background:none;color:var(--blue);padding:0;font:inherit;cursor:pointer;text-decoration:none}.row-actions button{color:var(--red)}.row-actions form{margin:0}.empty{text-align:center;color:var(--muted);padding:30px}.badge{font-size:12px;font-weight:800;padding:5px 9px;border-radius:20px}.badge.ok{background:#dcfce7;color:var(--green)}.badge.bad{background:#fee2e2;color:var(--red)}.alert{padding:13px 16px;border-radius:9px;margin-bottom:18px}.alert.success{background:#dcfce7;color:#166534}.alert.error{background:#fee2e2;color:#991b1b}.grade-form form{display:grid;grid-template-columns:2fr 2fr 1fr 1fr;gap:12px;align-items:end}.grade-form .wide{grid-column:span 3}.grade-form label{margin:0}.grade-form button{height:42px;margin-bottom:0}footer{text-align:center;color:var(--muted);padding:20px}@media(max-width:800px){.topbar{flex-direction:column;padding-top:16px}.topbar nav{width:100%;overflow:auto}.topbar nav a{padding:14px 12px;white-space:nowrap}.hero{align-items:flex-start;flex-direction:column}.stats{grid-template-columns:1fr 1fr}.grid-layout{grid-template-columns:1fr}.form-card{position:static}.grade-form form{grid-template-columns:1fr 1fr}.grade-form .wide{grid-column:span 2}}@media(max-width:520px){.stats,.form-row,.grade-form form{grid-template-columns:1fr}.grade-form .wide{grid-column:auto}.container{width:94%;margin-top:22px}.hero{padding:25px}.page-head{align-items:flex-start;flex-direction:column}}