:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}.app{width:95vw;height:95vh;margin:0 auto;padding:1rem;text-align:center;display:flex;flex-direction:column}.app h1{margin-bottom:1rem;color:#333;flex-shrink:0}.school-select{margin:0 auto 1rem}.school-select select{padding:.5rem .75rem;font-size:1rem;border:2px solid #007bff;border-radius:6px;background:#fff;color:#333}.placeholder-message{color:#555;font-size:1.05rem;margin-top:1rem}@media (prefers-color-scheme: dark){.app h1{color:#fffffff2}.placeholder-message{color:#ffffffde}}.students-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(200px,calc((95vw - 4rem)/8)),1fr));gap:.75rem;flex-grow:1;align-content:start;justify-content:center;width:100%;max-height:calc(95vh - 4rem);overflow-y:auto}.student-button{padding:1rem;border:2px solid #007bff;border-radius:8px;background:#fff;color:#007bff;font-size:1rem;font-weight:500;cursor:pointer;transition:all .2s ease;min-height:60px;display:flex;align-items:center;justify-content:center}.student-button:hover:not(:disabled){background:#007bff;color:#fff;transform:translateY(-2px);box-shadow:0 4px 8px #007bff33}.student-button:disabled{opacity:.6;cursor:not-allowed}.overlay{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.overlay-content{background:#fff;padding:2rem;border-radius:8px;max-width:500px;margin:0 1rem;text-align:center}.loading-spinner{border:4px solid #f3f3f3;border-top:4px solid #007bff;border-radius:50%;width:40px;height:40px;animation:spin 1s linear infinite;margin:0 auto}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.message{font-size:1.1rem;line-height:1.5}.message.success{color:#28a745}.message.error{color:#dc3545}.close-button{margin-top:1rem;padding:.5rem 1rem;background:#007bff;color:#fff;border:none;border-radius:4px;font-size:.9rem;cursor:pointer;transition:background-color .2s ease}.close-button:hover{background:#0056b3}