.next-challenge-widget{margin:20px auto;padding:10px;max-width:800px;background:#575757cc;box-shadow:0 2px 4px #0000001a;display:flex;flex-direction:row;gap:20px}.challenge-info{display:flex;flex-direction:column;justify-content:center}.challenge-info h3{margin:0;color:#e6e6e6;font-size:1.2em;text-align:center}.session-code{font-family:monospace;font-weight:700;color:#4698ef;font-size:1.1em;text-align:center}.creator{color:#6c757d;font-size:.9em}.challenge-details{display:flex;flex-direction:column}.start-time{color:#48ec6e;font-size:1.1em;text-align:center}.scheduled-time{color:#bec7ce;font-size:.9em;text-align:center}.atlas,.duration{color:#495057;font-size:.9em}.join-challenge-btn{background-color:#007bff;color:#fff;border:none;padding:5px 12px;border-radius:6px;cursor:pointer;font-size:1em;font-weight:500;transition:background-color .2s;margin-top:8px}.join-challenge-btn:hover{background-color:#0056b3}.loading{text-align:center;color:#6c757d;font-style:italic}.error{text-align:center;color:#dc3545;background-color:#f8d7da;padding:8px;border-radius:4px;border:1px solid #f5c6cb}.no-challenge{text-align:center;color:#6c757d;font-style:italic}.delete-challenge-btn{background:#f44;color:#fff;border:none;padding:5px 12px;border-radius:6px;cursor:pointer;font-size:1em;font-weight:500;transition:background-color .2s;margin-top:8px}.delete-challenge-btn:hover{background:#c00;transform:scale(1.1)}.delete-challenge-btn:active{transform:scale(.95)}@media (max-width: 768px){.next-challenge-widget{margin:15px;padding:15px}.challenge-header{flex-direction:column;gap:4px;align-items:flex-start}}