body{margin:0}.landing-container,.login-container{text-align:center;max-width:400px;margin:80px auto;padding:40px}.landing-container h1,.login-container h1{color:#333;margin-bottom:30px}.user-info{margin-bottom:30px}.user-info .avatar{border-radius:50%;width:80px;height:80px;margin-bottom:15px}.user-info p{color:#555;margin:5px 0}.btn{cursor:pointer;border:none;border-radius:6px;padding:12px 24px;font-size:16px;text-decoration:none;display:inline-block}.btn-primary{color:#fff;background-color:#007bff}.btn-primary:hover{background-color:#0056b3}.btn-secondary{color:#fff;background-color:#6c757d}.btn-secondary:hover{background-color:#545b62}.alert{border-radius:6px;margin-bottom:20px;padding:12px 16px}.alert-error{color:#721c24;background-color:#f8d7da;border:1px solid #f5c6cb}.study-container{background:#fff;border-radius:8px;max-width:600px;margin:40px auto;padding:30px;box-shadow:0 2px 8px #0000001a}.study-header{border-bottom:1px solid #e0e0e0;justify-content:space-between;align-items:center;margin-bottom:30px;padding-bottom:20px;display:flex}.study-header h1{color:#333;margin:0;font-size:24px}.study-status{text-transform:uppercase;border-radius:12px;padding:4px 12px;font-size:12px;font-weight:600;display:inline-block}.study-status--complete{color:#155724;background-color:#d4edda}.study-status--pending{color:#856404;background-color:#fff3cd}.study-status--in_progress{color:#004085;background-color:#cce5ff}.study-details{margin-bottom:30px}.study-detail{border-bottom:1px solid #f0f0f0;justify-content:space-between;padding:12px 0;display:flex}.study-detail:last-child{border-bottom:none}.study-detail-label{color:#666;font-weight:500}.study-detail-value{color:#333}.study-actions{flex-direction:column;gap:12px;display:flex}.btn-viewer{box-sizing:border-box;text-align:center;color:#fff;background-color:#28a745;width:100%;padding:14px 24px;font-weight:600;transition:background-color .2s;display:block}.btn-viewer:hover{background-color:#218838}