: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{min-height:100vh}.landing{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:80vh;gap:1rem}.landing h1{font-size:3rem;margin:0}.landing p{color:#666;margin:0}.sign-in-button{margin-top:1rem;padding:.75rem 2rem;font-size:1rem;background:#2563eb;color:#fff;border:none;border-radius:8px;cursor:pointer;transition:background .2s}.sign-in-button:hover{background:#1d4ed8}.header{display:flex;justify-content:space-between;align-items:center;padding:1rem 0;border-bottom:1px solid #e5e7eb;margin-bottom:2rem}.header h1{font-size:1.5rem;margin:0}.main{max-width:800px;margin:0 auto}.loading{display:flex;align-items:center;justify-content:center;min-height:50vh;color:#666}.error{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:50vh;gap:1rem;color:#dc2626}.error button{padding:.5rem 1rem;background:#f3f4f6;border:1px solid #d1d5db;border-radius:6px;cursor:pointer}.exam-selection{text-align:center}.exam-selection h2{margin-bottom:.5rem}.exam-selection>p{color:#666;margin-bottom:2rem}.exam-list{display:flex;flex-direction:column;gap:1rem}.exam-card{padding:1.5rem;border:1px solid #e5e7eb;border-radius:12px;text-align:left;transition:border-color .2s,box-shadow .2s}.exam-card:hover{border-color:#2563eb;box-shadow:0 4px 12px #2563eb1a}.exam-card h3{margin:0 0 .5rem}.exam-card p{color:#666;margin:0 0 1rem;font-size:.9rem}.enroll-button{padding:.75rem 1.5rem;font-size:1rem;background:#2563eb;color:#fff;border:none;border-radius:8px;cursor:pointer;transition:background .2s}.enroll-button:hover:not(:disabled){background:#1d4ed8}.enroll-button:disabled{background:#9ca3af;cursor:not-allowed}.learner-home h2{margin-bottom:1.5rem}.current-track{padding:1.5rem;border:1px solid #e5e7eb;border-radius:12px;text-align:left}.current-track h3{margin:0 0 .5rem;color:#2563eb}.current-track>p{color:#666;font-size:.9rem;margin:0 0 1.5rem}.progress-placeholder{padding:2rem;background:#f9fafb;border-radius:8px;text-align:center;color:#666}