*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #0d1117;--surface: #161b22;--border: #30363d;--text: #e6edf3;--text-muted: #8b949e;--accent: #4f8ef7}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;line-height:1.6}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.student-section{container-type:inline-size}.section-header{display:flex;align-items:center;gap:.75rem;margin-bottom:1.5rem}.section-header h2{font-size:1.25rem;font-weight:600;color:var(--text)}.badge{background:#21262d;border:1px solid var(--border);border-radius:999px;padding:.1rem .65rem;font-size:.8rem;color:var(--text-muted)}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:1rem}.card{position:relative;display:flex;align-items:center;gap:.85rem;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:1.5rem 1rem;transition:border-color .15s,transform .15s}.card:hover{border-color:var(--accent);transform:translateY(-2px)}.avatar{flex-shrink:0;width:42px;height:42px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:.9rem;color:#fff;letter-spacing:.04em}.card-info{display:flex;flex-direction:column;gap:.2rem;min-width:0}.card-name{font-size:.95rem;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.card-branch{font-size:.78rem;color:var(--text-muted)}.card-branch code{font-family:SFMono-Regular,Consolas,monospace}.instructor-tag{position:absolute;top:6px;right:8px;font-size:.65rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:#f7944f;border:1px solid #f7944f44;border-radius:4px;padding:0 5px}.empty-state{grid-column:1 / -1;text-align:center;padding:3rem;color:var(--text-muted);border:1px dashed var(--border);border-radius:12px;font-size:1rem}.app{display:flex;flex-direction:column;min-height:100vh}.hero{text-align:center;padding:4rem 1.5rem 3rem;background:linear-gradient(160deg,#161b22,#0d1117);border-bottom:1px solid var(--border)}.hero-badge{display:inline-block;background:#21262d;border:1px solid var(--border);border-radius:999px;padding:.25rem .9rem;font-size:.8rem;color:var(--text-muted);letter-spacing:.05em;margin-bottom:1rem;text-transform:uppercase}.hero-title{font-size:clamp(2rem,5vw,3.5rem);font-weight:800;letter-spacing:-.03em;background:linear-gradient(135deg,#e6edf3 30%,#4f8ef7);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:.75rem}.hero-subtitle{color:var(--text-muted);font-size:1.05rem;max-width:480px;margin:0 auto}main{flex:1;width:min(960px,100%);margin:0 auto;padding:2.5rem 1.5rem}.footer{text-align:center;padding:1.5rem;border-top:1px solid var(--border);color:var(--text-muted);font-size:.875rem}