:root{font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:#111827;background-color:#f3f4f6}*{box-sizing:border-box}body{margin:0}.app{max-width:1200px;margin:0 auto;padding:20px}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center}.auth-card{max-width:460px;width:100%}.compact-log{min-height:120px}h1{margin:0 0 8px}.subtitle{margin:0 0 20px;color:#4b5563}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:14px}.layout{display:grid;grid-template-columns:minmax(280px,360px) 1fr;gap:14px}@media (max-width: 960px){.layout{grid-template-columns:1fr}}.topbar{display:flex;flex-direction:column;align-items:stretch;margin-bottom:14px;gap:10px}.card{background:#fff;border:1px solid #e5e7eb;border-radius:10px;padding:14px}.card h3{margin-top:0}.row{display:flex;gap:8px;margin-bottom:8px;flex-wrap:wrap}input,select,button,textarea{border:1px solid #d1d5db;border-radius:6px;padding:8px;font:inherit}input,textarea{flex:1;min-width:120px}button{cursor:pointer;background:#111827;color:#fff}button:hover{background:#1f2937}.log{margin-top:18px;background:#0b1020;color:#e5e7eb;border-radius:10px;padding:12px;min-height:180px;white-space:pre-wrap;overflow-wrap:anywhere}.badge{display:inline-block;background:#e5e7eb;border-radius:12px;padding:2px 10px;font-size:12px}.small{color:#6b7280;font-size:13px}.course-list{max-height:70vh;overflow:auto}.course-item{width:100%;text-align:left;background:#fff;color:#111827;border:1px solid #e5e7eb;margin-bottom:8px}.course-item span{display:block;color:#6b7280;font-size:12px;margin-top:4px}.course-item.active{border-color:#111827;background:#f3f4f6}.course-detail h4{margin-bottom:8px}.date-list{display:flex;flex-direction:column;gap:8px}.date-item{border:1px solid #e5e7eb;border-radius:8px;padding:10px;display:flex;justify-content:space-between;gap:10px;align-items:center}.selected-course-panel{background:#f3f4f6}